CVE-2025-53518
Published: 25 August 2025
Summary
CVE-2025-53518 is a critical-severity Integer Overflow or Wraparound (CWE-190) vulnerability in Libbiosig Project Libbiosig. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 47.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly remediates the integer overflow vulnerability in libbiosig by applying patches or updates to affected versions.
Validates ABF file inputs prior to parsing to detect and reject specially crafted files that trigger the integer overflow.
Implements memory protections such as ASLR and DEP to mitigate arbitrary code execution resulting from the integer overflow.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Integer overflow in remote ABF file parsing directly enables remote code execution against public-facing applications processing such files (e.g., via uploads).
NVD Description
An integer overflow vulnerability exists in the ABF parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (35a819fa). A specially crafted ABF file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger…
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this vulnerability.
Deeper analysisAI
CVE-2025-53518 is an integer overflow vulnerability (CWE-190) in the ABF parsing functionality of The Biosig Project's libbiosig version 3.9.0 and Master Branch at commit 35a819fa. A specially crafted ABF file can trigger the integer overflow, leading to arbitrary code execution in applications that process ABF files using the affected library.
The vulnerability carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), making it remotely exploitable over a network with low attack complexity, no required privileges, and no user interaction. Any attacker capable of supplying a malicious ABF file to a vulnerable libbiosig instance—such as through file upload features or shared document processing—can achieve arbitrary code execution with high confidentiality, integrity, and availability impacts.
Mitigation details are available in the Talos Intelligence advisory at https://talosintelligence.com/vulnerability_reports/TALOS-2025-2231.
Details
- CWE(s)