How severe is CVE-2025-66861?

CVE-2025-66861 has a CVSS 3.x base score of 2.5, rated low severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2025-66861 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66861?

CVE-2025-66861 affects Gnu Binutils. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66861?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-66861 have an EU (EUVD) identifier?

Yes. CVE-2025-66861 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-205617.

When was CVE-2025-66861 published?

CVE-2025-66861 was published on 2025-12-29 and last updated on 2026-06-17.

CVE-2025-66861

CVE-2025-66861 is a low-severity vulnerability in Gnu Binutils with a CVSS 3.x base score of 2.5. 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-400.

Key facts

Severity: Low (CVSS 3.x base score 2.5)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-205617
Weakness: CWE-400
Affected product: Gnu Binutils
Published: 2025-12-29
Last modified: 2026-06-17

Description

An issue was discovered in function d_unqualified_name in file cp-demangle.c in BinUtils 2.26 allowing attackers to cause a denial of service via crafted PE file.

Frequently asked questions

What is CVE-2025-66861?: An issue was discovered in function d_unqualified_name in file cp-demangle.c in BinUtils 2.26 allowing attackers to cause a denial of service via crafted PE file.
How severe is CVE-2025-66861?: CVE-2025-66861 has a CVSS 3.x base score of 2.5, rated low severity. It is exploitable over local access with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2025-66861 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66861?: CVE-2025-66861 affects Gnu Binutils. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66861?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66861 have an EU (EUVD) identifier?: Yes. CVE-2025-66861 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-205617.
When was CVE-2025-66861 published?: CVE-2025-66861 was published on 2025-12-29 and last updated on 2026-06-17.

References

https://github.com/caozhzh/CRGF-Vul/blob/main/cxxfilt/crash1.md

Affected products (1)

cpe:2.3:a:gnu:binutils:2.26:*:*:*:*:*:*:*

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