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CVE-2025-52461VulnerabilityPublished Updated

CVE-2025-52461: The Biosig Project libbiosig · Out-of-bounds Read

Affects The Biosig Project libbiosigSource CVE Database V5

0

Not known to be exploited · CVSS 8.2 High.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score
8.2High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 43% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 Aug 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

Affected software

ProductAffectedFixed in
The Biosig Project libbiosigAffected
  • =3.9.0
Fixed in–

AI-suggested

To mitigate CVE-2025-52461, European organizations should implement the following specific measures: 1) Immediately audit and inventory all systems and applications using libbiosig versions 3.9.0 or the Master Branch (35a819fa) to identify exposure. 3) Implement strict input validation and sanitization for all .nex files before processing, including file integrity checks and format validation to detect malformed files. 4) Restrict the sources of .nex files to trusted and verified origins to prevent malicious file injection. 5) Monitor application logs and system behavior for signs of crashes or anomalous memory access patterns indicative of exploitation attempts. 6) Employ runtime protections such as Address Space Layout Randomization (ASLR) and Data Execution Prevention (DEP) to reduce exploitation success. 7) Educate staff and researchers about the risks of processing untrusted biosignal files and enforce secure data handling policies. 8) Consider network-level controls to limit exposure of systems that process .nex files to untrusted networks.

Description

An out-of-bounds read vulnerability exists in the Nex parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa). A specially crafted .nex file can lead to an information leak. An attacker can provide a malicious file to trigger this vulnerability.

References

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