Common Weakness Enumeration
CWE-502
AllowedDeserialization of Untrusted Data
Abstraction: Base · Status: Draft
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
5854 vulnerabilities reference this CWE, most recent first.
CVE-2026-21511 (GCVE-0-2026-21511)
Vulnerability from cvelistv5 – Published: 2026-02-10 17:51 – Updated: 2026-08-19 16:26
VLAI
EPSS
VEX
Title
Microsoft Outlook Spoofing Vulnerability
Summary
Deserialization of untrusted data in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-11 15:44 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
10 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC 2024 |
Affected:
16.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.106.26020821
(custom)
|
|
| Microsoft | Microsoft Office LTSC for Mac 2024 |
Affected:
16.0.0 , < 16.106.26020821
(custom)
|
|
| Microsoft | Microsoft SharePoint Enterprise Server 2016 |
Affected:
16.0.0 , < 16.0.5539.1002
(custom)
|
|
| Microsoft | Microsoft SharePoint Server 2019 |
Affected:
16.0.0 , < 16.0.10417.20097
(custom)
|
|
| Microsoft | Microsoft SharePoint Server Subscription Edition |
Affected:
16.0.0 , < 16.0.19127.20518
(custom)
|
|
| Microsoft | Microsoft Word 2016 |
Affected:
16.0.1 , < 16.0.5539.1002
(custom)
|
Date Public
2026-02-10 16:00
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CVE-2026-21226 (GCVE-0-2026-21226)
Vulnerability from cvelistv5 – Published: 2026-01-13 18:04 – Updated: 2026-07-30 20:47
VLAI
EPSS
VEX
Title
Azure Core shared client library for Python Remote Code Execution Vulnerability
Summary
Deserialization of untrusted data in Azure Core shared client library for Python allows an authorized attacker to execute code over a network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-13 18:28 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Azure Core shared client library for Python |
Affected:
1.1.0 , < 1.38.0
(custom)
cpe:2.3:a:microsoft:azure_core_shared_client_library_for_python:*:*:*:*:*:*:*:* |
Date Public
2026-01-13 16:00
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CVE-2026-20963 (GCVE-0-2026-20963)
Vulnerability from cvelistv5 – Published: 2026-01-13 17:56 – Updated: 2026-07-30 20:47
VLAI
EPSS
VEX
Title
Microsoft SharePoint Remote Code Execution Vulnerability
Summary
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
Severity
9.8 (Critical)
SSVC
Exploitation: active
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-08 00:00 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Microsoft SharePoint Enterprise Server 2016 |
Affected:
16.0.0 , < 16.0.5535.1001
(custom)
|
|
| Microsoft | Microsoft SharePoint Server 2019 |
Affected:
16.0.0 , < 16.0.10417.20083
(custom)
|
|
| Microsoft | Microsoft SharePoint Server Subscription Edition |
Affected:
16.0.0 , < 16.0.19127.20442
(custom)
|
Date Public
2026-01-13 16:00
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CVE-2026-20341 (GCVE-0-2026-20341)
Vulnerability from cvelistv5 – Published: 2026-09-16 20:08 – Updated: 2026-09-18 03:55
VLAI
EPSS
VEX
Title
Cisco Secure Firewall Management Center Software sftunnel Deserialization Root Command Execution Vulnerability
Summary
A vulnerability in the sftunnel inter-device communication protocol of Cisco Secure FMC Software could allow an authenticated, remote attacker to obtain root privileges.
This vulnerability is due to unsecured deserialization of untrusted data over the sftunnel management connection. An attacker could exploit this vulnerability by sending crafted sftunnel remote procedure calls (RPCs). A successful exploit could allow the attacker to gain root privileges on a device that is running Cisco Secure FMC Software and its high-availability peer.
To exploit this vulnerability, the attacker must have valid administrative credentials on a managed Cisco FTD device.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 00:00 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Secure Firewall Management Center (FMC) |
Affected:
7.0.0
Affected: 7.0.0.1 Affected: 7.0.1 Affected: 7.0.1.1 Affected: 7.0.2 Affected: 7.2.0 Affected: 7.0.2.1 Affected: 7.0.3 Affected: 7.2.0.1 Affected: 7.0.4 Affected: 7.2.1 Affected: 7.0.5 Affected: 7.3.0 Affected: 7.2.2 Affected: 7.3.1 Affected: 7.2.3 Affected: 7.2.3.1 Affected: 7.2.4 Affected: 7.0.6 Affected: 7.2.4.1 Affected: 7.2.5 Affected: 7.3.1.1 Affected: 7.4.0 Affected: 7.0.6.1 Affected: 7.2.5.1 Affected: 7.4.1 Affected: 7.2.6 Affected: 7.4.1.1 Affected: 7.0.6.2 Affected: 7.2.7 Affected: 7.2.5.2 Affected: 7.3.1.2 Affected: 7.2.8 Affected: 7.6.0 Affected: 7.4.2 Affected: 7.2.8.1 Affected: 7.0.6.3 Affected: 7.4.2.1 Affected: 7.2.9 Affected: 7.0.7 Affected: 7.7.0 Affected: 7.4.2.2 Affected: 7.2.10 Affected: 7.6.1 Affected: 7.4.2.3 Affected: 7.0.8 Affected: 7.6.2 Affected: 7.7.10 Affected: 7.2.10.1 Affected: 7.0.8.1 Affected: 7.6.2.1 Affected: 7.2.10.2 Affected: 7.7.10.1 Affected: 7.4.2.4 Affected: 7.4.3 Affected: 7.6.3 Affected: 7.7.11 Affected: 7.6.4 Affected: 10.0.0 Affected: 7.4.4 Affected: 7.4.5 Affected: 7.0.9 Affected: 7.2.11 Affected: 7.7.12 Affected: 7.6.5 Affected: 7.4.6 Affected: 10.0.1 Affected: 7.4.7 |
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CVE-2026-20340 (GCVE-0-2026-20340)
Vulnerability from cvelistv5 – Published: 2026-09-16 20:10 – Updated: 2026-09-18 03:56
VLAI
EPSS
VEX
Title
Cisco Secure Firewall Management Center Software Deserialization Arbitrary Root Command Execution Vulnerability
Summary
A vulnerability in Cisco Secure FMC Software could allow an authenticated, remote attacker to execute arbitrary commands at the root privilege level.
This vulnerability is due to unsecured deserialization of web-management user-controlled data. An attacker could exploit this vulnerability by authenticating to the device and sending a crafted HTTP payload. A successful exploit could allow the attacker to save the crafted payload and then execute it on the underlying operating system as root.
To exploit this vulnerability, the attacker must have valid credentials for a user account with at least the role of Security Analyst (read-only).
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 00:00 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Secure Firewall Management Center (FMC) |
Affected:
7.0.0
Affected: 7.0.0.1 Affected: 7.0.1 Affected: 7.0.1.1 Affected: 7.0.2 Affected: 7.2.0 Affected: 7.0.2.1 Affected: 7.0.3 Affected: 7.2.0.1 Affected: 7.0.4 Affected: 7.2.1 Affected: 7.0.5 Affected: 7.3.0 Affected: 7.2.2 Affected: 7.3.1 Affected: 7.2.3 Affected: 7.2.3.1 Affected: 7.2.4 Affected: 7.0.6 Affected: 7.2.4.1 Affected: 7.2.5 Affected: 7.3.1.1 Affected: 7.4.0 Affected: 7.0.6.1 Affected: 7.2.5.1 Affected: 7.4.1 Affected: 7.2.6 Affected: 7.4.1.1 Affected: 7.0.6.2 Affected: 7.2.7 Affected: 7.2.5.2 Affected: 7.3.1.2 Affected: 7.2.8 Affected: 7.6.0 Affected: 7.4.2 Affected: 7.2.8.1 Affected: 7.0.6.3 Affected: 7.4.2.1 Affected: 7.2.9 Affected: 7.0.7 Affected: 7.7.0 Affected: 7.4.2.2 Affected: 7.2.10 Affected: 7.6.1 Affected: 7.4.2.3 Affected: 7.0.8 Affected: 7.6.2 Affected: 7.7.10 Affected: 7.2.10.1 Affected: 7.0.8.1 Affected: 7.6.2.1 Affected: 7.2.10.2 Affected: 7.7.10.1 Affected: 7.4.2.4 Affected: 7.4.3 Affected: 7.6.3 Affected: 7.7.11 Affected: 7.6.4 Affected: 10.0.0 Affected: 7.4.4 Affected: 7.4.5 Affected: 7.0.9 Affected: 7.2.11 Affected: 7.7.12 Affected: 7.6.5 Affected: 7.4.6 Affected: 10.0.1 Affected: 7.4.7 |
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CVE-2026-20307 (GCVE-0-2026-20307)
Vulnerability from cvelistv5 – Published: 2026-09-16 16:55 – Updated: 2026-09-17 11:39
VLAI
EPSS
VEX
Title
Cisco Identity Services Engine Remote Code Execution Vulnerability
Summary
A vulnerability in the web-based management interface of Cisco ISE could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have at least low-privileged administrative credentials.
This vulnerability is due to insecure deserialization of a user-supplied Java byte stream. An attacker could exploit this vulnerability by sending a crafted serialized Java object to the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the device and elevate privileges to root. In single-node deployments, successful exploitation of this vulnerability could cause the affected ISE node to become unavailable, resulting in a denial of service (DoS) condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 03:57 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Identity Services Engine Software |
Affected:
3.1.0
Affected: 3.1.0 p1 Affected: 3.1.0 p3 Affected: 3.1.0 p2 Affected: 3.2.0 Affected: 3.1.0 p4 Affected: 3.1.0 p5 Affected: 3.2.0 p1 Affected: 3.1.0 p6 Affected: 3.2.0 p2 Affected: 3.1.0 p7 Affected: 3.3.0 Affected: 3.2.0 p3 Affected: 3.2.0 p4 Affected: 3.1.0 p8 Affected: 3.2.0 p5 Affected: 3.2.0 p6 Affected: 3.1.0 p9 Affected: 3.3 Patch 2 Affected: 3.3 Patch 1 Affected: 3.3 Patch 3 Affected: 3.4.0 Affected: 3.2.0 p7 Affected: 3.3 Patch 4 Affected: 3.4 Patch 1 Affected: 3.1.0 p10 Affected: 3.3 Patch 5 Affected: 3.3 Patch 6 Affected: 3.4 Patch 2 Affected: 3.3 Patch 7 Affected: 3.4 Patch 3 Affected: 3.5.0 Affected: 3.4 Patch 4 Affected: 3.3 Patch 8 Affected: 3.2 Patch 8 Affected: 3.5 Patch 1 Affected: 3.3 Patch 9 Affected: 3.2 Patch 9 Affected: 3.4 Patch 5 Affected: 3.5 Patch 3 Affected: 3.5 Patch 2 Affected: 3.3 Patch 10 Affected: 3.3 Patch 11 Affected: 3.4 Patch 6 Affected: 3.2 Patch 10 Affected: 3.1.0 p72 Affected: 3.1.0 p11 |
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GCVE-1-2026-20263 (CVE-2026-95806)
Vulnerability from gna-1 – Published: 2026-09-22 15:08 – Updated: 2026-09-22 15:09
VLAI
EPSS
VEX
Title
MISP: PHP phar stream wrapper enables deserialization and code execution via caller-influenced filesystem paths
Summary
MISP ships with PHP's phar stream wrapper registered in both its web entry point and its console entry point.
The phar stream wrapper causes PHP to treat a phar archive as a directory, which has two security consequences:
- any filesystem operation on a caller-influenced path that resolves to a phar archive triggers an implicit unserialize() call, creating a deserialization sink;
- a relocated application root can reach executable code inside an uploaded phar file, enabling arbitrary code execution as the web user.
No component of MISP, the vendored CakePHP framework, or any runtime-loaded library reads or constructs phar archives. The wrapper therefore serves no legitimate purpose in the MISP runtime and exists solely as an available primitive for an attacker who can influence a filesystem path argument.
Severity
CWE
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/MISP/MISP/commit/08fa755b6 | patch |
GCVE extensions
AI-generated
Human-reviewed
Confidence: medium
Model
qwen3.8:27b
advisory
bcp-05-x-01bcp-05-x-02
Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. Human validation is required before publication.
ai-computer-assisted:llm-generatedai-computer-assisted:classification
| Model | Source | Identifier |
|---|---|---|
| qwen3.8:27b | ollama | qwen3.8:27b |
- Generator
-
patch2vuln.pyon 2026-09-22 15:01 - Model
qwen3.8:27b- Input
-
https://github.com/MISP/MISP/commit/08fa755b6.patch
f4fc3223e642… - Confidence
- medium
| Commit | Subject | Patch SHA-256 |
|---|---|---|
08fa755b6363
|
chg: [internal] Unregister the phar stream wrapper in the | f4fc3223e642… |
Fix summary
The phar stream wrapper is unregistered via stream_wrapper_unregister('phar') at the top of both the web and console entry points, before any framework bootstrap or application code executes. Because no MISP component, CakePHP, or runtime library requires the phar wrapper, removing it eliminates the implicit unserialize() sink and the directory-like phar archive behavior without functional impact. This closes the deserialization and code-execution primitive application-wide, independent of whether individual callers validate their path arguments.
Patch summary
Two files are modified. In app/Console/cake.php and app/webroot/index.php, a 14-line block is inserted immediately after the file header comment and before any existing logic. The block checks whether 'phar' is present in stream_get_wrappers() and, if so, calls stream_wrapper_unregister('phar'). A docblock comment explains the security rationale: the wrapper turns filesystem calls on caller-influenced paths into unserialize() sinks and allows a relocated application root to reach code inside an uploaded file. No other code is changed; the total diff is 28 insertions across the two files.
CVSS rationale
AV:N: The vulnerability is reachable through the web entry point (app/webroot/index.php), making it network-accessible. AC:H: Exploitation requires crafting a valid phar archive with a malicious serialized payload and identifying a code path where a caller-influenced filesystem argument resolves to that archive; the commit describes this as an 'argument-injection exploit,' implying non-trivial path manipulation. AT:N: No specific attack-target conditions are indicated. PR:L: MISP is a threat-intelligence platform that typically requires authenticated access; the commit references 'the web user' context, suggesting the attacker operates within the application's privilege boundary. UI:N: No user interaction is required. VC/VI/VA:H: Successful exploitation results in arbitrary code execution as the web user, compromising confidentiality, integrity, and availability of the MISP instance. SC/SI/SA:N: No evidence of impact on subsequent or other components beyond the MISP instance itself.
Weakness rationale
- CWE-502 The phar stream wrapper causes PHP to invoke unserialize() implicitly whenever a filesystem operation resolves to a phar archive. An attacker who can influence the path argument (e.g., via argument injection) can supply a crafted phar file, triggering deserialization of attacker-controlled data and leading to code execution. This is the primary and most specific weakness.
- CWE-74 The phar stream wrapper is a special element of the PHP runtime that was not neutralized (unregistered) in the MISP entry points. Its presence allows downstream filesystem calls to be subverted into deserialization sinks. This is a secondary, broader characterization of the same issue.
Attack pattern rationale
- CAPEC-570 The core attack mechanism is that the phar stream wrapper turns a filesystem call on a caller-influenced path into an implicit unserialize() invocation. An attacker crafts a phar archive containing a malicious serialized payload and causes the application to perform a filesystem operation on that path, triggering deserialization and code execution. CAPEC-570 is the closest match. Uncertainty: the exact injection vector (which specific MISP endpoint or console command accepts the path) is not detailed in the patch, but the deserialization sink is explicitly described in the commit message.
- CAPEC-100 The phar stream wrapper is a trusted, built-in PHP component that the attacker leverages in the MISP runtime environment where it serves no legitimate purpose. The attacker does not need to exploit a flaw in the wrapper itself; rather, its mere presence in the runtime provides the primitive. This is a secondary mapping; CAPEC-570 is preferred as the primary because it more precisely describes the deserialization mechanism.
Assumptions to verify
- The affected version range is inferred from the tag_version_boundary (v2.5.47, 42 commits after fix), suggesting the fix is included in v2.5.47 and earlier versions are affected. The explicit context lists affected_version and fixed_version as null, so the exact boundary is uncertain.
- PR:L is assumed because MISP is an authenticated threat-intelligence platform; however, the patch does not explicitly state whether the vulnerable code path requires authentication. If the argument-injection vector is reachable unauthenticated, PR should be N.
- AC:H is assumed because crafting a valid phar archive and identifying the correct code path for the filesystem call is non-trivial; the commit describes it as an 'argument-injection exploit,' implying specific conditions must be met.
- The CAPEC-570 mapping is based on the commit message's explicit description of the phar wrapper as an 'unserialize() sink'; the exact MISP endpoint or console command that accepts the attacker-influenced path is not identified in the patch.
- The commit message references 'the job-argument guard reverted,' implying a prior guard existed and was removed, making the phar wrapper the remaining defense. The exact prior guard is not described in this patch.
- The Co-Authored-By line lists 'Claude Opus 5 (1M context)' as a co-author; this is recorded in the metadata as a remediation developer but is an AI assistant, not a human contributor. It is excluded from credits to avoid attributing a CVE credit to a non-human entity.
Model comparison
Selected qwen3.8:27b
by deterministic-consensus-v1
The selected result is closest to model consensus; this heuristic does not establish factual correctness and human review remains required.
| Model | Score | Agreement | Confidence | Assumptions |
|---|---|---|---|---|
qwen3.8:27b |
4 | 9 | medium | 6 |
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"fixSummary": "The phar stream wrapper is unregistered via stream_wrapper_unregister(\u0027phar\u0027) at the top of both the web and console entry points, before any framework bootstrap or application code executes. Because no MISP component, CakePHP, or runtime library requires the phar wrapper, removing it eliminates the implicit unserialize() sink and the directory-like phar archive behavior without functional impact. This closes the deserialization and code-execution primitive application-wide, independent of whether individual callers validate their path arguments.",
"generatedAt": "2026-09-22T15:01:21.211955Z",
"generator": "patch2vuln.py",
"model": "qwen3.8:27b",
"modelComparison": {
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"assumptionCount": 6,
"confidence": "medium",
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"selectionMethod": "deterministic-consensus-v1",
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},
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"patchTruncated": false,
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"source": "https://github.com/MISP/MISP/commit/08fa755b6.patch",
"sourceUrl": "https://github.com/MISP/MISP/commit/08fa755b6.patch",
"subject": "chg: [internal] Unregister the phar stream wrapper in the"
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],
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"cweId": "CWE-502",
"rationale": "The phar stream wrapper causes PHP to invoke unserialize() implicitly whenever a filesystem operation resolves to a phar archive. An attacker who can influence the path argument (e.g., via argument injection) can supply a crafted phar file, triggering deserialization of attacker-controlled data and leading to code execution. This is the primary and most specific weakness."
},
{
"cweId": "CWE-74",
"rationale": "The phar stream wrapper is a special element of the PHP runtime that was not neutralized (unregistered) in the MISP entry points. Its presence allows downstream filesystem calls to be subverted into deserialization sinks. This is a secondary, broader characterization of the same issue."
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CVE-2026-20251 (GCVE-0-2026-20251)
Vulnerability from cvelistv5 – Published: 2026-06-10 17:16 – Updated: 2026-06-11 03:55
VLAI
EPSS
VEX
Title
Remote Code Execution through Deserialization of Untrusted Data in Splunk Secure Gateway
Summary
In Splunk Enterprise versions below 10.2.4, 10.0.7, 9.4.12, and 9.3.13, Splunk Cloud Platform versions below 10.3.2512.12, 10.2.2510.14, 10.1.2507.22, and 9.3.2411.132, and Splunk Secure Gateway versions below 3.10.6, 3.9.20, and 3.8.67, a low-privileged user that does not hold the 'admin' or 'power' Splunk roles could perform a Remote Code Execution (RCE) through the Splunk Secure Gateway app.<br><br>The Remote Code Execution is possible because of unsafe deserialization of App Key Value Store (KV Store) data through the ‘jsonpickle’ Python library, which reconstructs arbitrary Python objects from specially crafted JavaScript Object Notation (JSON) without adequate validation.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 00:00 UTC
CWE
- CWE-502 - The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
Assigner
References
1 reference
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Splunk | Splunk Enterprise |
Affected:
10.2 , < 10.2.4
(custom)
Affected: 10.0 , < 10.0.7 (custom) Affected: 9.4 , < 9.4.12 (custom) Affected: 9.3 , < 9.3.13 (custom) |
|
| Splunk | Splunk Cloud Platform |
Affected:
10.3.2512 , < 10.3.2512.12
(custom)
Affected: 10.2.2510 , < 10.2.2510.14 (custom) Affected: 10.1.2507 , < 10.1.2507.22 (custom) Affected: 9.3.2411 , < 9.3.2411.132 (custom) |
|
| Splunk | Splunk Secure Gateway |
Affected:
3.10 , < 3.10.6
(custom)
Affected: 3.9 , < 3.9.20 (custom) Affected: 3.8 , < 3.8.67 (custom) |
Date Public
2026-06-10 00:00
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CVE-2026-20242 (GCVE-0-2026-20242)
Vulnerability from cvelistv5 – Published: 2026-09-16 20:08 – Updated: 2026-09-18 03:55
VLAI
EPSS
VEX
Title
Cisco Secure Firewall Management Center Software Java Deserialization Remote Code Execution Vulnerability
Summary
A vulnerability in the External Database Access feature of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to execute arbitrary commands as root on an affected device.
This vulnerability is due to insecure deserialization of a user-supplied Java byte stream from a host that is configured in the external database access list. An attacker could exploit this vulnerability by sending a crafted, serialized Java byte stream to a specific TCP port of an affected device. A successful exploit could allow the attacker to execute arbitrary commands on the device and elevate privileges to root.
Notes:
This vulnerability can be exploited only by an attacker who has control of a host in the external database access list.
If the FMC management interface does not have public internet access, the attack surface that is associated with this vulnerability is reduced.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 00:00 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Secure Firewall Management Center (FMC) |
Affected:
7.0.0
Affected: 7.0.0.1 Affected: 7.0.1 Affected: 7.0.1.1 Affected: 7.0.2 Affected: 7.2.0 Affected: 7.0.2.1 Affected: 7.0.3 Affected: 7.2.0.1 Affected: 7.0.4 Affected: 7.2.1 Affected: 7.0.5 Affected: 7.3.0 Affected: 7.2.2 Affected: 7.3.1 Affected: 7.2.3 Affected: 7.2.3.1 Affected: 7.2.4 Affected: 7.0.6 Affected: 7.2.4.1 Affected: 7.2.5 Affected: 7.3.1.1 Affected: 7.4.0 Affected: 7.0.6.1 Affected: 7.2.5.1 Affected: 7.4.1 Affected: 7.2.6 Affected: 7.4.1.1 Affected: 7.0.6.2 Affected: 7.2.7 Affected: 7.2.5.2 Affected: 7.3.1.2 Affected: 7.2.8 Affected: 7.6.0 Affected: 7.4.2 Affected: 7.2.8.1 Affected: 7.0.6.3 Affected: 7.4.2.1 Affected: 7.2.9 Affected: 7.0.7 Affected: 7.7.0 Affected: 7.4.2.2 Affected: 7.2.10 Affected: 7.6.1 Affected: 7.4.2.3 Affected: 7.0.8 Affected: 7.6.2 Affected: 7.7.10 Affected: 7.2.10.1 Affected: 7.0.8.1 Affected: 7.6.2.1 Affected: 7.2.10.2 Affected: 7.7.10.1 Affected: 7.4.2.4 Affected: 7.4.3 Affected: 7.6.3 Affected: 7.7.11 Affected: 7.6.4 Affected: 10.0.0 Affected: 7.4.4 Affected: 7.4.5 Affected: 7.0.9 Affected: 7.2.11 Affected: 7.7.12 Affected: 7.6.5 Affected: 7.4.6 Affected: 10.0.1 Affected: 7.4.7 |
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CVE-2026-20211 (GCVE-0-2026-20211)
Vulnerability from cvelistv5 – Published: 2026-09-16 20:04 – Updated: 2026-09-17 11:39
VLAI
EPSS
VEX
Title
Cisco Identity Services Engine Remote Code Execution Vulnerability
Summary
A vulnerability in Cisco ISE could allow an authenticated, remote attacker to execute arbitrary commands on the underlying operating system of an affected device. To exploit this vulnerability, the attacker must have valid high-privileged administrative credentials.
This vulnerability is due to insecure deserialization of Java objects by the affected software. An attacker could exploit this vulnerability by sending a crafted serialized Java object to an affected device. A successful exploit could allow the attacker to obtain user-level access to the underlying operating system and then elevate privileges to root. In single-node deployments, successful exploitation of this vulnerability could cause the affected ISE node to become unavailable, resulting in a DoS condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 03:57 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Identity Services Engine Software |
Affected:
3.1.0
Affected: 3.1.0 p1 Affected: 3.1.0 p3 Affected: 3.1.0 p2 Affected: 3.2.0 Affected: 3.1.0 p4 Affected: 3.1.0 p5 Affected: 3.2.0 p1 Affected: 3.1.0 p6 Affected: 3.2.0 p2 Affected: 3.1.0 p7 Affected: 3.3.0 Affected: 3.2.0 p3 Affected: 3.2.0 p4 Affected: 3.1.0 p8 Affected: 3.2.0 p5 Affected: 3.2.0 p6 Affected: 3.1.0 p9 Affected: 3.3 Patch 2 Affected: 3.3 Patch 1 Affected: 3.3 Patch 3 Affected: 3.4.0 Affected: 3.2.0 p7 Affected: 3.3 Patch 4 Affected: 3.4 Patch 1 Affected: 3.1.0 p10 Affected: 3.3 Patch 5 Affected: 3.3 Patch 6 Affected: 3.4 Patch 2 Affected: 3.3 Patch 7 Affected: 3.4 Patch 3 Affected: 3.5.0 Affected: 3.4 Patch 4 Affected: 3.3 Patch 8 Affected: 3.2 Patch 8 Affected: 3.5 Patch 1 Affected: 3.3 Patch 9 Affected: 3.2 Patch 9 Affected: 3.4 Patch 5 Affected: 3.5 Patch 3 Affected: 3.5 Patch 2 Affected: 3.3 Patch 10 Affected: 3.3 Patch 11 Affected: 3.4 Patch 6 Affected: 3.2 Patch 10 Affected: 3.1.0 p72 Affected: 3.1.0 p11 |
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Mitigation
Architecture and Design
Implementation
If available, use the signing/sealing features of the programming language to assure that deserialized data has not been tainted. For example, a hash-based message authentication code (HMAC) could be used to ensure that data has not been modified.
Mitigation
Implementation
When deserializing data, populate a new object rather than just deserializing. The result is that the data flows through safe input validation and that the functions are safe.
Mitigation
Implementation
Explicitly define a final object() to prevent deserialization.
Mitigation
Architecture and Design
Implementation
- Make fields transient to protect them from deserialization.
- An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.
Mitigation
Implementation
Avoid having unnecessary types or gadgets (a sequence of instances and method invocations that can self-execute during the deserialization process, often found in libraries) available that can be leveraged for malicious ends. This limits the potential for unintended or unauthorized types and gadgets to be leveraged by the attacker. Add only acceptable classes to an allowlist. Note: new gadgets are constantly being discovered, so this alone is not a sufficient mitigation.
Mitigation
Architecture and Design
Implementation
Employ cryptography of the data or code for protection. However, it's important to note that it would still be client-side security. This is risky because if the client is compromised then the security implemented on the client (the cryptography) can be bypassed.
Mitigation MIT-29
Operation
Strategy: Firewall
Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth [REF-1481].
CAPEC-586: Object Injection
An adversary attempts to exploit an application by injecting additional, malicious content during its processing of serialized objects. Developers leverage serialization in order to convert data or state into a static, binary format for saving to disk or transferring over a network. These objects are then deserialized when needed to recover the data/state. By injecting a malformed object into a vulnerable application, an adversary can potentially compromise the application by manipulating the deserialization process. This can result in a number of unwanted outcomes, including remote code execution.