CWE-331
Insufficient Entropy
Description
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.
Hierarchy (View 1000)
Related attack patterns (CAPEC)
CAPEC-59
CVEs mapped to this weakness (72)
page 2 of 4| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2014-0691 | Hig | 0.48 | 7.3 | 0.01 | Oct 24, 2017 | Cisco WebEx Meetings Server before 1.1 uses meeting IDs with insufficient entropy, which makes it easier for remote attackers to bypass authentication and join arbitrary meetings without a password, aka Bug ID CSCuc79643. | ||
| CVE-2026-8700 | Hig | 0.47 | 7.3 | 0.00 | May 15, 2026 | Crypt::DSA versions before 1.20 for Perl generate seeds using rand. Seeds were generated using Perl's built-in rand function, which is predictable and unsuitable for security usage. | ||
| CVE-2026-34236 | Hig | 0.46 | 8.2 | 0.00 | Apr 1, 2026 | Auth0-PHP is a PHP SDK for Auth0 Authentication and Management APIs. From version 8.0.0 to before version 8.19.0, in applications built with the Auth0 PHP SDK, cookies are encrypted with insufficient entropy, which may result in threat actors brute-forcing the encryption key and… | ||
| CVE-2023-3325 | Hig | 0.46 | 8.1 | 0.01 | Jun 20, 2023 | The CMS Commander plugin for WordPress is vulnerable to authorization bypass due to the use of an insufficiently unique cryptographic signature on the 'cmsc_add_site' function in versions up to, and including, 2.287. This makes it possible for unauthenticated attackers to the… | ||
| CVE-2026-1814 | Med | 0.44 | — | 0.00 | Feb 3, 2026 | 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… | ||
| CVE-2026-46473 | Hig | 0.42 | 7.5 | 0.00 | May 21, 2026 | Authen::TOTP versions before 0.1.1 for Perl generate secrets using rand. Secrets were generated using Perl's built-in rand function, which is predictable and unsuitable for security usage. | ||
| CVE-2026-7210 | Hig | 0.42 | 7.5 | 0.01 | May 11, 2026 | `xml.parsers.expat` and `xml.etree.ElementTree` use insufficient entropy for Expat hash-flooding protection, which allows a crafted XML document to trigger hash flooding.\r\n\r\nFully mitigating this vulnerability requires both updating libexpat to 2.8.0 or later and applying… | ||
| CVE-2026-2541 | Med | 0.42 | — | 0.00 | Feb 15, 2026 | 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… | ||
| CVE-2024-56370 | Med | 0.42 | 6.5 | 0.00 | Apr 5, 2025 | Net::Xero 0.044 and earlier for Perl uses the rand() function as the default source of entropy, which is not cryptographically secure, for cryptographic functions. Specifically Net::Xero uses the Data::Random library which specifically states that it is "Useful mostly for test… | ||
| CVE-2015-7764 | Hig | 0.42 | 7.5 | 0.02 | Aug 9, 2017 | Lemur 0.1.4 does not use sufficient entropy in its IV when encrypting AES in CBC mode. | ||
| CVE-2017-6030 | Med | 0.42 | 6.5 | 0.02 | Jun 30, 2017 | A predictable value range from previous values issue was discovered in Schneider Electric Modicon PLCs Modicon M221, firmware versions prior to Version 1.5.0.0, Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware versions prior to Version… | ||
| CVE-2016-2858 | Med | 0.42 | 6.5 | 0.00 | Apr 7, 2016 | QEMU, when built with the Pseudo Random Number Generator (PRNG) back-end support, allows local guest OS users to cause a denial of service (process crash) via an entropy request, which triggers arbitrary stack based allocation and memory corruption. | ||
| CVE-2024-26329 | Med | 0.40 | 6.2 | 0.00 | Apr 5, 2024 | Chilkat before v9.5.0.98, allows attackers to obtain sensitive information via predictable PRNG in ChilkatRand::randomBytes function. | ||
| CVE-2025-14261 | Hig | 0.39 | 7.1 | 0.00 | Dec 8, 2025 | 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. | ||
| CVE-2025-54885 | Med | 0.38 | — | 0.00 | Aug 7, 2025 | 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… | ||
| CVE-2016-2564 | Med | 0.38 | 5.9 | 0.01 | Apr 23, 2017 | Invision Power Services (IPS) Community Suite before 4.1.9 makes session hijack easier by relying on the PHP uniqid function without the more_entropy flag. Attackers can guess an Invision Power Board session cookie if they can predict the exact time of cookie generation. | ||
| CVE-2025-0577 | Med | 0.31 | 4.8 | 0.00 | Feb 18, 2026 | An insufficient entropy vulnerability was found in glibc. The getrandom and arc4random family of functions may return predictable randomness if these functions are called again after the fork, which happens concurrently with a call to any of these functions. | ||
| CVE-2025-32898 | Med | 0.31 | 4.7 | 0.00 | Dec 5, 2025 | 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… | ||
| CVE-2025-14972 | — | Med | 0.27 | — | 0.00 | May 15, 2026 | * 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. | |
| CVE-2024-9055 | Med | 0.27 | 4.2 | 0.00 | Mar 17, 2025 | The DPA countermeasures on Silicon Labs' Series 2 devices are not reseeded periodically as they should be. This may allow an attacker to eventually extract secret keys through a DPA attack. |
- risk 0.48cvss 7.3epss 0.01
Cisco WebEx Meetings Server before 1.1 uses meeting IDs with insufficient entropy, which makes it easier for remote attackers to bypass authentication and join arbitrary meetings without a password, aka Bug ID CSCuc79643.
- risk 0.47cvss 7.3epss 0.00
Crypt::DSA versions before 1.20 for Perl generate seeds using rand. Seeds were generated using Perl's built-in rand function, which is predictable and unsuitable for security usage.
- risk 0.46cvss 8.2epss 0.00
Auth0-PHP is a PHP SDK for Auth0 Authentication and Management APIs. From version 8.0.0 to before version 8.19.0, in applications built with the Auth0 PHP SDK, cookies are encrypted with insufficient entropy, which may result in threat actors brute-forcing the encryption key and…
- risk 0.46cvss 8.1epss 0.01
The CMS Commander plugin for WordPress is vulnerable to authorization bypass due to the use of an insufficiently unique cryptographic signature on the 'cmsc_add_site' function in versions up to, and including, 2.287. This makes it possible for unauthenticated attackers to the…
- risk 0.44cvss —epss 0.00
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…
- risk 0.42cvss 7.5epss 0.00
Authen::TOTP versions before 0.1.1 for Perl generate secrets using rand. Secrets were generated using Perl's built-in rand function, which is predictable and unsuitable for security usage.
- risk 0.42cvss 7.5epss 0.01
`xml.parsers.expat` and `xml.etree.ElementTree` use insufficient entropy for Expat hash-flooding protection, which allows a crafted XML document to trigger hash flooding.\r\n\r\nFully mitigating this vulnerability requires both updating libexpat to 2.8.0 or later and applying…
- risk 0.42cvss —epss 0.00
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…
- risk 0.42cvss 6.5epss 0.00
Net::Xero 0.044 and earlier for Perl uses the rand() function as the default source of entropy, which is not cryptographically secure, for cryptographic functions. Specifically Net::Xero uses the Data::Random library which specifically states that it is "Useful mostly for test…
- risk 0.42cvss 7.5epss 0.02
Lemur 0.1.4 does not use sufficient entropy in its IV when encrypting AES in CBC mode.
- risk 0.42cvss 6.5epss 0.02
A predictable value range from previous values issue was discovered in Schneider Electric Modicon PLCs Modicon M221, firmware versions prior to Version 1.5.0.0, Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware versions prior to Version…
- risk 0.42cvss 6.5epss 0.00
QEMU, when built with the Pseudo Random Number Generator (PRNG) back-end support, allows local guest OS users to cause a denial of service (process crash) via an entropy request, which triggers arbitrary stack based allocation and memory corruption.
- risk 0.40cvss 6.2epss 0.00
Chilkat before v9.5.0.98, allows attackers to obtain sensitive information via predictable PRNG in ChilkatRand::randomBytes function.
- risk 0.39cvss 7.1epss 0.00
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.
- risk 0.38cvss —epss 0.00
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…
- risk 0.38cvss 5.9epss 0.01
Invision Power Services (IPS) Community Suite before 4.1.9 makes session hijack easier by relying on the PHP uniqid function without the more_entropy flag. Attackers can guess an Invision Power Board session cookie if they can predict the exact time of cookie generation.
- risk 0.31cvss 4.8epss 0.00
An insufficient entropy vulnerability was found in glibc. The getrandom and arc4random family of functions may return predictable randomness if these functions are called again after the fork, which happens concurrently with a call to any of these functions.
- risk 0.31cvss 4.7epss 0.00
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…
- risk 0.27cvss —epss 0.00
* 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.
- risk 0.27cvss 4.2epss 0.00
The DPA countermeasures on Silicon Labs' Series 2 devices are not reseeded periodically as they should be. This may allow an attacker to eventually extract secret keys through a DPA attack.