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.
207 vulnerabilities reference this CWE, most recent first.
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 (v2.0.3)
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 (v2.0.3)
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 (v2.0.3)
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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CVE-2025-47781 (GCVE-0-2025-47781)
Vulnerability from cvelistv5 – Published: 2025-05-14 15:52 – Updated: 2025-05-14 17:37
VLAI
EPSS
VEX
Title
Rallly Insufficient Password Login Token Entropy Leads to Account Takeover
Summary
Rallly is an open-source scheduling and collaboration tool. Versions up to and including 3.22.1 of the application features token based authentication. When a user attempts to login to the application, they insert their email and a 6 digit code is sent to their email address to complete the authentication. A token that consists of 6 digits only presents weak entropy however and when coupled with no token brute force protection, makes it possible for an unauthenticated attacker with knowledge of a valid email address to successfully brute force the token within 15 minutes (token expiration time) and take over the account associated with the targeted email address. All users on the Rallly applications are impacted. As long as an attacker knows the user's email address they used to register on the app, they can systematically take over any user account. For the authentication mechanism to be safe, the token would need to be assigned a complex high entropy value that cannot be bruteforced within reasonable time, and ideally rate limiting the /api/auth/callback/email endpoint to further make brute force attempts unreasonable within the 15 minutes time. As of time of publication, no patched versions are available.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/lukevella/rallly/security/advi… | x_refsource_CONFIRM |
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CVE-2025-32898 (GCVE-0-2025-32898)
Vulnerability from cvelistv5 – Published: 2025-12-05 00:00 – Updated: 2025-12-05 14:40
VLAI
EPSS
VEX
Summary
The KDE Connect verification-code protocol before 2025-04-18 uses only 8 characters and therefore allows brute-force attacks. This affects KDE Connect before 1.33.0 on Android, KDE Connect before 25.04 on desktop, KDE Connect before 0.5 on iOS, Valent before 1.0.0.alpha.47, and GSConnect before 59.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| KDE | KDE Connect verification-code protocol |
Affected:
0 , < 2025-04-18
(custom)
|
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CVE-2025-27552 (GCVE-0-2025-27552)
Vulnerability from cvelistv5 – Published: 2025-03-26 11:08 – Updated: 2025-09-05 13:21
VLAI
EPSS
VEX
Title
DBIx::Class::EncodedColumn until 0.00032 for Perl uses insecure rand() function for salting password hashes in Crypt/Eksblowfish/Bcrypt.pm
Summary
DBIx::Class::EncodedColumn use the rand() function, which is not cryptographically secure to salt password hashes.
This vulnerability is associated with program files Crypt/Eksblowfish/Bcrypt.pm.
This issue affects DBIx::Class::EncodedColumn until 0.00032.
Severity
4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://security.metacpan.org/docs/guides/random-… | related |
| https://metacpan.org/release/WREIS/DBIx-Class-Enc… | release-notes |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| WREIS | DBIx::Class::EncodedColumn |
Affected:
0 , < 0.00032
(custom)
|
Credits
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CVE-2025-27551 (GCVE-0-2025-27551)
Vulnerability from cvelistv5 – Published: 2025-03-26 11:07 – Updated: 2025-09-05 13:20
VLAI
EPSS
VEX
Title
DBIx::Class::EncodedColumn until 0.00032 for Perl uses insecure rand() function for salting password hashes in Digest.pm
Summary
DBIx::Class::EncodedColumn use the rand() function, which is not cryptographically secure to salt password hashes.
This vulnerability is associated with program files lib/DBIx/Class/EncodedColumn/Digest.pm.
This issue affects DBIx::Class::EncodedColumn until 0.00032.
Severity
4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://security.metacpan.org/docs/guides/random-… | related |
| https://metacpan.org/release/WREIS/DBIx-Class-Enc… | release-notes |
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1 product
| Vendor | Product | Version | |
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| WREIS | DBIx::Class::EncodedColumn |
Affected:
0 , < 0.00032
(custom)
|
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CVE-2025-15387 (GCVE-0-2025-15387)
Vulnerability from cvelistv5 – Published: 2025-12-31 08:23 – Updated: 2025-12-31 16:05
VLAI
EPSS
VEX
Title
QNO Technology｜VPN Firewall - Insufficient Entropy
Summary
VPN Firewall developed by QNO Technology has a Insufficient Entropy vulnerability, allowing unauthenticated remote attackers to obtain any logged-in user session through brute-force attacks and subsequently log into the system.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.twcert.org.tw/tw/cp-132-10613-e1780-1.html | third-party-advisory |
| https://www.twcert.org.tw/en/cp-139-10614-dee41-2.html | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| QNO Technology | VPN Firewall |
Affected:
0
(custom)
|
Date Public
2025-12-31 08:18
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CVE-2025-14972 (GCVE-0-2025-14972)
Vulnerability from cvelistv5 – Published: 2026-05-15 14:35 – Updated: 2026-05-15 15:40
VLAI
EPSS
VEX
Title
Insufficient DPA countermeasure reseeding
Summary
* Countermeasures for DPA within SYMCRYPTO
engine on SixG301xxx devices are not sufficiently random and will
eventually repeat.
* KSU keys using SYMCRYPTO will be
impacted by this vulnerability.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-331 - Insufficient entropy
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://community.silabs.com/068Vm00000M3cAX | third-party-advisorypermissions-required |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| silabs.com | Simplicity SDK |
Affected:
0 , ≤ *.*
(semver)
|
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CVE-2025-14261 (GCVE-0-2025-14261)
Vulnerability from cvelistv5 – Published: 2025-12-08 18:12 – Updated: 2025-12-08 18:20
VLAI
EPSS
VEX
Title
Lack of entropy allows registered low-privileged users of Litmus to crack valid JWT tokens and gain admin privileges
Summary
The Litmus platform uses JWT for authentication and authorization, but the secret being used for signing the JWT is only 6 bytes long at its core, which makes it extremely easy to crack.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-331 - Insufficient Entropy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://research.jfrog.com/vulnerabilities/litmus… | third-party-advisory |
| https://github.com/litmuschaos/litmus/pull/5324 | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Litmuschaos | litmus |
Affected:
0 , < 3.23.0
(custom)
|
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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.