Common Weakness Enumeration

CWE-502

Allowed

Deserialization of Untrusted Data

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

4819 vulnerabilities reference this CWE, most recent first.

CVE-2025-42999 (GCVE-0-2025-42999)

Vulnerability from cvelistv5 – Published: 2025-05-13 00:17 – Updated: 2026-02-26 18:28
VLAI
Title
Insecure Deserialization in SAP NetWeaver (Visual Composer development server)
Summary
SAP NetWeaver Visual Composer Metadata Uploader is vulnerable when a privileged user can upload untrusted or malicious content which, when deserialized, could potentially lead to a compromise of confidentiality, integrity, and availability of the host system.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
sap
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2025-42980 (GCVE-0-2025-42980)

Vulnerability from cvelistv5 – Published: 2025-07-08 00:38 – Updated: 2025-07-08 14:29
VLAI
Title
Insecure Deserialization in SAP NetWeaver Enterprise Portal Federated Portal Network
Summary
SAP NetWeaver Enterprise Portal Federated Portal Network is vulnerable when a privileged user can upload untrusted or malicious content which, when deserialized, could potentially lead to a compromise of confidentiality, integrity, and availability of the host system.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
sap
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2025-42966 (GCVE-0-2025-42966)

Vulnerability from cvelistv5 – Published: 2025-07-08 00:36 – Updated: 2026-02-26 18:27
VLAI
Title
Insecure Deserialization vulnerability in SAP NetWeaver (XML Data Archiving Service)
Summary
SAP NetWeaver XML Data Archiving Service allows an authenticated attacker with administrative privileges to exploit an insecure Java deserialization vulnerability by sending a specially crafted serialized Java object. This could lead to high impact on confidentiality, integrity, and availability of the application.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
sap
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2025-42964 (GCVE-0-2025-42964)

Vulnerability from cvelistv5 – Published: 2025-07-08 00:35 – Updated: 2026-02-26 18:27
VLAI
Title
Insecure Deserialization in SAP NetWeaver Enterprise Portal Administration
Summary
SAP NetWeaver Enterprise Portal Administration is vulnerable when a privileged user can upload untrusted or malicious content which, when deserialized, could potentially lead to a compromise of confidentiality, integrity, and availability of the host system.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
sap
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2025-42963 (GCVE-0-2025-42963)

Vulnerability from cvelistv5 – Published: 2025-07-08 00:35 – Updated: 2026-02-26 18:27
VLAI
Title
Insecure Deserialization in SAP NetWeaver Application Server for Java (Log Viewer )
Summary
A critical vulnerability in SAP NetWeaver Application server for Java Log Viewer enables authenticated administrator users to exploit unsafe Java object deserialization. Successful exploitation can lead to full operating system compromise, granting attackers complete control over the affected system. This results in a severe impact on the confidentiality, integrity, and availability of the application and host environment.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
sap
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2025-42944 (GCVE-0-2025-42944)

Vulnerability from cvelistv5 – Published: 2025-09-09 02:11 – Updated: 2026-02-26 17:49
VLAI
Title
Insecure Deserialization vulnerability in SAP Netweaver (RMI-P4)
Summary
Due to a deserialization vulnerability in SAP NetWeaver, an unauthenticated attacker could exploit the system through the RMI-P4 module by submitting malicious payload to an open port. The deserialization of such untrusted Java objects could lead to arbitrary OS command execution, posing a high impact to the application's confidentiality, integrity, and availability.
Severity
10 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
sap
References
Impacted products
Vendor Product Version
SAP_SE SAP Netweaver (RMI-P4) Affected: SERVERCORE 7.50
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-42928 (GCVE-0-2025-42928)

Vulnerability from cvelistv5 – Published: 2025-12-09 02:15 – Updated: 2026-02-26 16:57
VLAI
Title
Deserialization Vulnerability in SAP jConnect - SDK for ASE
Summary
Under certain conditions, a high privileged user could exploit a deserialization vulnerability in SAP jConnect to launch remote code execution. The system may be vulnerable when specially crafted input is used to exploit the vulnerability resulting in high impact on confidentiality, integrity and availability of the system.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
sap
References
Impacted products
Vendor Product Version
SAP_SE SAP jConnect - SDK for ASE Affected: SYBASE_SOFTWARE_DEVELOPER_KIT 16.0.4
Affected: 16.1
Create a notification for this product.
Show details on NVD website
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CVE-2025-41701 (GCVE-0-2025-41701)

Vulnerability from cvelistv5 – Published: 2025-09-09 08:57 – Updated: 2025-09-09 19:32
VLAI
Title
Beckhoff: Deserialization of untrusted data by TwinCAT 3 Engineering
Summary
An unauthenticated attacker can trick a local user into executing arbitrary commands by opening a deliberately manipulated project file with an affected engineering tool. These arbitrary commands are executed in the user context.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Beckhoff TE1000 | TwinCAT 3 Enineering Affected: 0 , < 3.1.4024.67 (semver)
Create a notification for this product.
Credits
Peter Cheng ELEX FEIGONG RESEARCH INSTITUTE of Elex CyberSecurity, Inc.
Show details on NVD website
To clipboard 

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CVE-2025-41700 (GCVE-0-2025-41700)

Vulnerability from cvelistv5 – Published: 2025-12-01 10:02 – Updated: 2025-12-01 13:59
VLAI
Title
CODESYS Development System - Deserialization of Untrusted Data
Summary
An unauthenticated attacker can trick a local user into executing arbitrary code by opening a deliberately manipulated CODESYS project file with a CODESYS development system. This arbitrary code is executed in the user context.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
CODESYS CODESYS Development System Affected: 0.0.0 , < 3.5.21.40 (semver)
Create a notification for this product.
Credits
MengyuXia from Beijing Aerospace Wanyuan Science & Technology Co, Ltd.
Show details on NVD website
To clipboard 

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CVE-2025-40759 (GCVE-0-2025-40759)

Vulnerability from cvelistv5 – Published: 2025-08-12 11:17 – Updated: 2025-12-09 10:44
VLAI
Summary
A vulnerability has been identified in SIMATIC S7-PLCSIM V17 (All versions), SIMATIC STEP 7 V17 (All versions < V17 Update 9), SIMATIC STEP 7 V18 (All versions), SIMATIC STEP 7 V19 (All versions < V19 Update 4), SIMATIC STEP 7 V20 (All versions < V20 Update 4), SIMATIC WinCC V17 (All versions < V17 Update 9), SIMATIC WinCC V18 (All versions), SIMATIC WinCC V19 (All versions < V19 Update 4), SIMATIC WinCC V20 (All versions < V20 Update 4), SIMOCODE ES V17 (All versions), SIMOCODE ES V18 (All versions), SIMOCODE ES V19 (All versions), SIMOCODE ES V20 (All versions), SIMOTION SCOUT TIA V5.4 (All versions), SIMOTION SCOUT TIA V5.5 (All versions), SIMOTION SCOUT TIA V5.6 (All versions < V5.6 SP1 HF7), SIMOTION SCOUT TIA V5.7 (All versions), SINAMICS Startdrive V17 (All versions), SINAMICS Startdrive V18 (All versions), SINAMICS Startdrive V19 (All versions), SINAMICS Startdrive V20 (All versions), SIRIUS Safety ES V17 (TIA Portal) (All versions), SIRIUS Safety ES V18 (TIA Portal) (All versions), SIRIUS Safety ES V19 (TIA Portal) (All versions), SIRIUS Safety ES V20 (TIA Portal) (All versions), SIRIUS Soft Starter ES V17 (TIA Portal) (All versions), SIRIUS Soft Starter ES V18 (TIA Portal) (All versions), SIRIUS Soft Starter ES V19 (TIA Portal) (All versions), SIRIUS Soft Starter ES V20 (TIA Portal) (All versions), TIA Portal Cloud V17 (All versions), TIA Portal Cloud V18 (All versions), TIA Portal Cloud V19 (All versions < V5.2.1.1), TIA Portal Cloud V20 (All versions < V5.2.2.2). Affected products do not properly sanitize stored security properties when parsing project files. This could allow an attacker to cause a type confusion and execute arbitrary code within the affected application.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.5 (High)
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Siemens SIMATIC S7-PLCSIM V17 Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIMATIC STEP 7 V17 Affected: 0 , < V17 Update 9 (custom)
Create a notification for this product.
Siemens SIMATIC STEP 7 V18 Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIMATIC STEP 7 V19 Affected: 0 , < V19 Update 4 (custom)
Create a notification for this product.
Siemens SIMATIC STEP 7 V20 Affected: 0 , < V20 Update 4 (custom)
Create a notification for this product.
Siemens SIMATIC WinCC V17 Affected: 0 , < V17 Update 9 (custom)
Create a notification for this product.
Siemens SIMATIC WinCC V18 Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIMATIC WinCC V19 Affected: 0 , < V19 Update 4 (custom)
Create a notification for this product.
Siemens SIMATIC WinCC V20 Affected: 0 , < V20 Update 4 (custom)
Create a notification for this product.
Siemens SIMOCODE ES V17 Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIMOCODE ES V18 Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIMOCODE ES V19 Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIMOCODE ES V20 Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIMOTION SCOUT TIA V5.4 Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIMOTION SCOUT TIA V5.5 Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIMOTION SCOUT TIA V5.6 Affected: 0 , < V5.6 SP1 HF7 (custom)
Create a notification for this product.
Siemens SIMOTION SCOUT TIA V5.7 Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SINAMICS Startdrive V17 Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SINAMICS Startdrive V18 Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SINAMICS Startdrive V19 Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SINAMICS Startdrive V20 Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIRIUS Safety ES V17 (TIA Portal) Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIRIUS Safety ES V18 (TIA Portal) Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIRIUS Safety ES V19 (TIA Portal) Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIRIUS Safety ES V20 (TIA Portal) Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIRIUS Soft Starter ES V17 (TIA Portal) Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIRIUS Soft Starter ES V18 (TIA Portal) Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIRIUS Soft Starter ES V19 (TIA Portal) Affected: 0 , < * (custom)
Create a notification for this product.
Siemens SIRIUS Soft Starter ES V20 (TIA Portal) Affected: 0 , < * (custom)
Create a notification for this product.
Siemens TIA Portal Cloud V17 Affected: 0 , < * (custom)
Create a notification for this product.
Siemens TIA Portal Cloud V18 Affected: 0 , < * (custom)
Create a notification for this product.
Siemens TIA Portal Cloud V19 Affected: 0 , < V5.2.1.1 (custom)
Create a notification for this product.
Siemens TIA Portal Cloud V20 Affected: 0 , < V5.2.2.2 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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          "value": "A vulnerability has been identified in SIMATIC S7-PLCSIM V17 (All versions), SIMATIC STEP 7 V17 (All versions \u003c V17 Update 9), SIMATIC STEP 7 V18 (All versions), SIMATIC STEP 7 V19 (All versions \u003c V19 Update 4), SIMATIC STEP 7 V20 (All versions \u003c V20 Update 4), SIMATIC WinCC V17 (All versions \u003c V17 Update 9), SIMATIC WinCC V18 (All versions), SIMATIC WinCC V19 (All versions \u003c V19 Update 4), SIMATIC WinCC V20 (All versions \u003c V20 Update 4), SIMOCODE ES V17 (All versions), SIMOCODE ES V18 (All versions), SIMOCODE ES V19 (All versions), SIMOCODE ES V20 (All versions), SIMOTION SCOUT TIA V5.4 (All versions), SIMOTION SCOUT TIA V5.5 (All versions), SIMOTION SCOUT TIA V5.6 (All versions \u003c V5.6 SP1 HF7), SIMOTION SCOUT TIA V5.7 (All versions), SINAMICS Startdrive V17 (All versions), SINAMICS Startdrive V18 (All versions), SINAMICS Startdrive V19 (All versions), SINAMICS Startdrive V20 (All versions), SIRIUS Safety ES V17 (TIA Portal) (All versions), SIRIUS Safety ES V18 (TIA Portal) (All versions), SIRIUS Safety ES V19 (TIA Portal) (All versions), SIRIUS Safety ES V20 (TIA Portal) (All versions), SIRIUS Soft Starter ES V17 (TIA Portal) (All versions), SIRIUS Soft Starter ES V18 (TIA Portal) (All versions), SIRIUS Soft Starter ES V19 (TIA Portal) (All versions), SIRIUS Soft Starter ES V20 (TIA Portal) (All versions), TIA Portal Cloud V17 (All versions), TIA Portal Cloud V18 (All versions), TIA Portal Cloud V19 (All versions \u003c V5.2.1.1), TIA Portal Cloud V20 (All versions \u003c V5.2.2.2). Affected products do not properly sanitize stored security properties when parsing project files. This could allow an attacker to cause a type confusion and execute arbitrary code within the affected application."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
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            "version": "4.0"
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              "description": "CWE-502: Deserialization of Untrusted Data",
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        "dateUpdated": "2025-12-09T10:44:22.355Z",
        "orgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77",
        "shortName": "siemens"
      },
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        {
          "url": "https://cert-portal.siemens.com/productcert/html/ssa-493396.html"
        }
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    "assignerShortName": "siemens",
    "cveId": "CVE-2025-40759",
    "datePublished": "2025-08-12T11:17:10.465Z",
    "dateReserved": "2025-04-16T08:39:30.031Z",
    "dateUpdated": "2025-12-09T10:44:22.355Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}
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.

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