CWE-340Class

Generation of Predictable Numbers or Identifiers

Incomplete in the CWE catalog · 55 CVEs mapped

55
CVEs mapped
6.8
Median CVSS
What it is

The product uses a scheme that generates numbers or identifiers that are more predictable than required.

Recent examples
8.8cvss
CVE-2026-85496

CVE-2026-85496 - HIGH Severity Vulnerability

The Botslab G980H dash camera firmware generates session identifiers using a small sequential value space rather than a suitably unpredictable source. An unauthenticated attacker with adjacent network access and knowledge that an active session exists could potentially determine a valid session identifier and use it to bypass intended authorization controls.

HIGHno explanation yet
0%
epss
7.5cvss
CVE-2026-95653

CVE-2026-95653 - HIGH Severity Vulnerability

Concrete CMS Community Store before 2.7.8 derives digital product download tokens from order creation timestamps instead of random values, making tokens predictable. Unauthenticated attackers can enumerate sequential order and file identifiers to calculate valid download tokens and retrieve digital goods purchased by other customers.

HIGHno explanation yet
1%
epss
—none
CVE-2026-64964

CVE-2026-64964 - UNKNOWN Severity Vulnerability

ATutor generates predictable email confirmation tokens due to the use of insufficiently random values in the account confirmation functionality. Due to the use of predictable values related to user registration, an attacker who knows or can predict these values can guess valid account activation tokens. This allows an attacker to activate an unconfirmed account without access to the victim's email inbox. Product is no longer actively supported and the vulnerabilities have not been fixed. Only version 2.2.4 was tested and confirmed as vulnerable, other versions were not tested but might also be vulnerable.

no explanation yet
0%
epss
The record
Technical detail
CWE ID
CWE-340
Abstraction
Class
Structure
Simple
Status
Incomplete