Common Weakness Enumeration
CWE-331
AllowedInsufficient Entropy
Abstraction: Base · Status: Draft
The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.
221 vulnerabilities reference this CWE, most recent first.
CVE-2026-2541 (GCVE-0-2026-2541)
Vulnerability from cvelistv5 – Published: 2026-02-15 11:07 – Updated: 2026-02-17 17:06
VLAI
EPSS
VEX
Title
Micca KE700 Brute-force vulnerability due to low entropy
Summary
The Micca KE700 system relies on a 6-bit portion of an identifier for authentication within rolling codes, providing only 64 possible combinations. This low entropy allows an attacker to perform a brute-force attack against one component of the rolling code. Successful exploitation simplify an attacker to predict the next valid rolling code, granting unauthorized access to the vehicle.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-17 16:42 UTC
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://asrg.io/security-advisories/cve-2026-2541/ | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Micca Auto Electronics Co., Ltd. | Car Alarm System KE700 |
Affected:
KE700
Unknown: KE700+ |
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CVE-2026-2336 (GCVE-0-2026-2336)
Vulnerability from cvelistv5 – Published: 2026-04-16 17:02 – Updated: 2026-04-16 17:34
VLAI
EPSS
VEX
Title
Weak webstax_auth Cookie Authentication Allows Privilege Escalation
Summary
A privilege escalation vulnerability in Microchip IStaX allows an authenticated low-privileged user to recover a shared per-device cookie secret from their own webstax_auth session cookie and forge a new cookie with administrative privileges.This issue affects IStaX before 2026.03.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-16 17:34 UTC
CWE
- CWE-331 - Insufficient entropy
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.microchip.com/en-us/solutions/technol… | vendor-advisory |
Date Public
2026-04-14 00:00
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CVE-2026-1814 (GCVE-0-2026-1814)
Vulnerability from cvelistv5 – Published: 2026-02-03 14:54 – Updated: 2026-02-26 15:04
VLAI
EPSS
VEX
Title
Rapid7 Nexpose Insecure Java Keystore Password Generation
Summary
Rapid7 Nexpose versions 6.4.50 and later are vulnerable to an insufficient entropy issue in the CredentialsKeyStorePassword.generateRandomPassword() method. When updating legacy keystore passwords, the application generates a new password with insufficient length (7-12 characters) and a static prefix 'p', resulting in a weak keyspace. An attacker with access to the nsc.ks file can brute-force this password using consumer-grade hardware to decrypt stored credentials.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-04 04:55 UTC
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.atredis.com/disclosure | exploitthird-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Rapid7 | InsightVM/Nexpose |
Affected:
6.4.50 , < 8.36.0
(semver)
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CVE-2025-67504 (GCVE-0-2025-67504)
Vulnerability from cvelistv5 – Published: 2025-12-09 03:31 – Updated: 2025-12-09 15:10
VLAI
EPSS
VEX
Title
WBCE CMS has Weak Random Number Generator in Password Generation Function
Summary
WBCE CMS is a content management system. Versions 1.6.4 and below use function GenerateRandomPassword() to create passwords using PHP's rand(). rand() is not cryptographically secure, which allows password sequences to be predicted or brute-forced. This can lead to user account compromise or privilege escalation if these passwords are used for new accounts or password resets. The vulnerability is fixed in version 1.6.5.
Severity
9.1 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-09 15:10 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/WBCE/WBCE_CMS/security/advisor… | x_refsource_CONFIRM |
| https://github.com/WBCE/WBCE_CMS/commit/5d59fe021… | x_refsource_MISC |
| https://cwe.mitre.org/data/definitions/338.html | x_refsource_MISC |
| https://github.com/WBCE/WBCE_CMS/releases/tag/1.6.5 | x_refsource_MISC |
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CVE-2025-66565 (GCVE-0-2025-66565)
Vulnerability from cvelistv5 – Published: 2025-12-09 01:47 – Updated: 2025-12-09 16:03
VLAI
EPSS
VEX
Title
Fiber Utils UUIDv4 and UUID Silent Fallback to Predictable Values
Summary
Fiber Utils is a collection of common functions created for Fiber. In versions 2.0.0-rc.3 and below, when the system's cryptographic random number generator (crypto/rand) fails, both functions silently fall back to returning predictable UUID values, including the zero UUID "00000000-0000-0000-0000-000000000000". The vulnerability occurs through two related but distinct failure paths, both ultimately caused by crypto/rand.Read() failures, compromising the security of all Fiber applications using these functions for security-critical operations. This issue is fixed in version 2.0.0-rc.4.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-09 14:16 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/gofiber/utils/security/advisor… | x_refsource_CONFIRM |
| https://github.com/gofiber/utils/commit/6c6cf0470… | x_refsource_MISC |
Impacted products
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CVE-2025-62774 (GCVE-0-2025-62774)
Vulnerability from cvelistv5 – Published: 2025-10-22 00:00 – Updated: 2025-10-22 15:48
VLAI
EPSS
VEX
Summary
On Mercku M6a devices through 2.1.0, the authentication system uses predictable session tokens based on timestamps.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-22 15:48 UTC
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
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CVE-2025-59015 (GCVE-0-2025-59015)
Vulnerability from cvelistv5 – Published: 2025-09-09 09:00 – Updated: 2025-09-09 19:31
VLAI
EPSS
VEX
Title
Insufficient Entropy in Password Generation
Summary
A deterministic three‑character prefix in the Password Generation component of TYPO3 CMS versions 12.0.0–12.4.36 and 13.0.0–13.4.17 reduces entropy, allowing attackers to carry out brute‑force attacks more quickly.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-09 19:31 UTC
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://typo3.org/security/advisory/typo3-core-sa… | vendor-advisory |
Impacted products
Date Public
2025-09-09 09:00
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CVE-2025-54885 (GCVE-0-2025-54885)
Vulnerability from cvelistv5 – Published: 2025-08-07 00:02 – Updated: 2025-08-07 14:13
VLAI
EPSS
VEX
Title
Thinbus generates insufficient entropy: 252 bits vs minimum 256 bits
Summary
Thinbus Javascript Secure Remote Password is a browser SRP6a implementation for zero-knowledge password authentication. In versions 2.0.0 and below, a protocol compliance bug causes the client to generate a fixed 252 bits of entropy instead of the intended bit length of the safe prime (defaulted to 2048 bits). The client public value is being generated from a private value that is 4 bits below the specification. This reduces the protocol's designed security margin it is now practically exploitable. The servers full sized 2048 bit random number is used to create the shared session key and password proof. This is fixed in version 2.0.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-08-07 14:13 UTC
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/simbo1905/thinbus-srp-npm/secu… | x_refsource_CONFIRM |
| https://github.com/simbo1905/thinbus-srp-npm/issues/28 | x_refsource_MISC |
| https://github.com/simbo1905/thinbus-srp-npm/pull… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| simbo1905 | thinbus-srp-npm |
Affected:
< 2.0.1
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CVE-2025-52464 (GCVE-0-2025-52464)
Vulnerability from cvelistv5 – Published: 2025-06-19 15:10 – Updated: 2025-06-23 17:39
VLAI
EPSS
VEX
Title
Meshtastic Repeated Public and Private Keypairs
Summary
Meshtastic is an open source mesh networking solution. In versions from 2.5.0 to before 2.6.11, the flashing procedure of several hardware vendors was resulting in duplicated public/private keys. Additionally, the Meshtastic was failing to properly initialize the internal randomness pool on some platforms, leading to possible low-entropy key generation. When users with an affected key pair sent Direct Messages, those message could be captured and decrypted by an attacker that has compiled the list of compromised keys. This issue has been patched in version 2.6.11 where key generation is delayed til the first time the LoRa region is set, along with warning users when a compromised key is detected. Version 2.6.12 furthers this patch by automatically wiping known compromised keys when found. A workaround to this vulnerability involves users doing a complete device wipe to remove vendor-cloned keys.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-06-23 17:39 UTC
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/meshtastic/firmware/security/a… | x_refsource_CONFIRM |
| https://github.com/meshtastic/firmware/commit/4bf… | x_refsource_MISC |
| https://github.com/meshtastic/firmware/commit/55b… | x_refsource_MISC |
| https://github.com/meshtastic/firmware/commit/e5f… | x_refsource_MISC |
| https://github.com/meshtastic/firmware/commit/e62… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| meshtastic | firmware |
Affected:
> 2.5.0, < 2.6.11
|
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CVE-2025-50122 (GCVE-0-2025-50122)
Vulnerability from cvelistv5 – Published: 2025-07-11 09:17 – Updated: 2025-11-03 20:05
VLAI
EPSS
VEX
Summary
A CWE-331: Insufficient Entropy vulnerability exists that could cause root password discovery when the
password generation algorithm is reverse engineered with access to installation or upgrade artifacts.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-11 15:08 UTC
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Schneider Electric | EcoStruxure™ IT Data Center Expert |
Affected:
8.3 , ≤ Prior to
(custom)
|
Date Public
2025-07-08 05:00
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Mitigation
Implementation
Determine the necessary entropy to adequately provide for randomness and predictability. This can be achieved by increasing the number of bits of objects such as keys and seeds.
CAPEC-59: Session Credential Falsification through Prediction
This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.