How severe is CVE-2025-66044?

CVE-2025-66044 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-66044 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66044?

CVE-2025-66044 affects Libbiosig Project Libbiosig. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66044?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-66044 have an EU (EUVD) identifier?

Yes. CVE-2025-66044 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-202763.

When was CVE-2025-66044 published?

CVE-2025-66044 was published on 2025-12-11 and last updated on 2026-06-17.

CVE-2025-66044

CVE-2025-66044 is a critical-severity vulnerability in Libbiosig Project Libbiosig with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-202763
Weakness: CWE-787
Affected product: Libbiosig Project Libbiosig
Published: 2025-12-11
Last modified: 2026-06-17

Description

Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.1. A specially crafted MFER file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger these vulnerabilities.When Tag is 64

Frequently asked questions

What is CVE-2025-66044?: Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.1. A specially crafted MFER file can lead to arbitrary code execution. An attacker can provide a malicious file to trigger these vulnerabilities.When Tag is 64
How severe is CVE-2025-66044?: CVE-2025-66044 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-66044 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66044?: CVE-2025-66044 affects Libbiosig Project Libbiosig. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66044?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-66044 have an EU (EUVD) identifier?: Yes. CVE-2025-66044 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-202763.
When was CVE-2025-66044 published?: CVE-2025-66044 was published on 2025-12-11 and last updated on 2026-06-17.

References

https://talosintelligence.com/vulnerability_reports/TALOS-2025-2296

Affected products (1)

cpe:2.3:a:libbiosig_project:libbiosig:*:*:*:*:*:*:*:*

More vulnerabilities in Libbiosig Project Libbiosig

CVE-2026-22891 — Critical (CVSS 9.8): A heap-based buffer overflow vulnerability exists in the Intan CLP parsing functionality of The Biosig Project…
CVE-2025-66048 — Critical (CVSS 9.8): Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project…
CVE-2025-66047 — Critical (CVSS 9.8): Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project…
CVE-2025-66046 — Critical (CVSS 9.8): Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project…
CVE-2025-66045 — Critical (CVSS 9.8): Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project…
CVE-2025-66043 — Critical (CVSS 9.8): Several stack-based buffer overflow vulnerabilities exists in the MFER parsing functionality of The Biosig Project…

All CVEs affecting Libbiosig Project Libbiosig →

Other CWE-787 (Out-of-bounds Write) vulnerabilities

CVE-2026-42369 — Critical (CVSS 10.0): GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other…
CVE-2026-4746 — Critical (CVSS 10.0): Out-of-bounds Write vulnerability in timeplus-io proton (base/poco/Foundation/src‎ modules). This vulnerability is…
CVE-2025-43300 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS…
CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
CVE-2024-42479 — Critical (CVSS 10.0): llama.cpp provides LLM inference in C/C++. The unsafe `data` pointer member in the `rpc_tensor` structure can cause…
CVE-2024-39791 — Critical (CVSS 10.0): Stack-based buffer overflow vulnerabilities affecting Vonets industrial wifi bridge relays and wifi bridge…

Browse all CWE-787 (Out-of-bounds Write) vulnerabilities →