CWE-331
Insufficient Entropy
BaseDraft
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 (44)
page 2 of 3| CVE | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|
| 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 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. | |
| 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 exploitation simplify an attacker to predict the next valid rolling code, granting unauthorized access to the vehicle. | |
| 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 programs". Data::Random uses the rand() function. | |
| CVE-2015-7764 | Hig | 0.42 | 7.5 | 0.00 | 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 | 0.00 | 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 4.0.5.11. The affected products generate insufficiently random TCP initial sequence numbers that may allow an attacker to predict the numbers from previous values. This may allow an attacker to spoof or disrupt TCP connections. | |
| 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 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. | |
| CVE-2016-2564 | Med | 0.38 | 5.9 | 0.00 | 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 GSConnect before 59. | |
| 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. | |
| CVE-2025-27552 | Med | 0.26 | 4.0 | 0.00 | Mar 26, 2025 | 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. | |
| CVE-2025-27551 | Med | 0.26 | 4.0 | 0.00 | Mar 26, 2025 | 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. | |
| CVE-2025-6931 | Low | 0.24 | 3.7 | 0.00 | Jun 30, 2025 | A vulnerability classified as problematic was found in D-Link DCS-6517 and DCS-7517 up to 2.02.0. Affected by this vulnerability is the function generate_pass_from_mac of the file /bin/httpd of the component Root Password Generation Handler. The manipulation leads to insufficient entropy. The attack can be launched remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer. | |
| CVE-2025-62774 | Low | 0.20 | 3.1 | 0.00 | Oct 22, 2025 | On Mercku M6a devices through 2.1.0, the authentication system uses predictable session tokens based on timestamps. | |
| CVE-2026-41080 | Low | 0.19 | 2.9 | 0.00 | Apr 16, 2026 | libexpat before 2.8.0 uses insufficient entropy, and thus hash flooding can occur via a crafted XML document. | |
| CVE-2025-2814 | Med | 0.19 | 4.0 | 0.00 | Apr 13, 2025 | Crypt::CBC versions between 1.21 and 3.05 for Perl may use the rand() function as the default source of entropy, which is not cryptographically secure, for cryptographic functions. This issue affects operating systems where "/dev/urandom'" is unavailable. In that case, Crypt::CBC will fallback to use the insecure rand() function. |