How severe is CVE-2025-66045?

CVE-2025-66045 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-2025-66045 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66045?

CVE-2025-66045 affects Libbiosig Project Libbiosig. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66045?

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-2025-66045 have an EU (EUVD) identifier?

Yes. CVE-2025-66045 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-202762.

When was CVE-2025-66045 published?

CVE-2025-66045 was published on 2025-12-11 and last updated on 2026-06-17.

CVE-2025-66045

CVE-2025-66045 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% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-202762
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 65

Frequently asked questions

What is CVE-2025-66045?: 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 65
How severe is CVE-2025-66045?: CVE-2025-66045 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-2025-66045 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66045?: CVE-2025-66045 affects Libbiosig Project Libbiosig. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66045?: 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-2025-66045 have an EU (EUVD) identifier?: Yes. CVE-2025-66045 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-202762.
When was CVE-2025-66045 published?: CVE-2025-66045 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:*:*:*:*:*:*:*:*

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