How severe is CVE-2025-66863?

CVE-2025-66863 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-66863 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66863?

CVE-2025-66863 affects Gnu Binutils. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66863?

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

Does CVE-2025-66863 have an EU (EUVD) identifier?

Yes. CVE-2025-66863 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-205619.

When was CVE-2025-66863 published?

CVE-2025-66863 was published on 2025-12-29 and last updated on 2026-06-17.

CVE-2025-66863

CVE-2025-66863 is a high-severity vulnerability in Gnu Binutils with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-205619
Weakness: CWE-400
Affected product: Gnu Binutils
Published: 2025-12-29
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2025-66863?: An issue was discovered in function d_discriminator in file cp-demangle.c in BinUtils 2.26 allows attackers to cause a denial of service via crafted PE file.
How severe is CVE-2025-66863?: CVE-2025-66863 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-66863 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66863?: CVE-2025-66863 affects Gnu Binutils. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66863?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-66863 have an EU (EUVD) identifier?: Yes. CVE-2025-66863 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-205619.
When was CVE-2025-66863 published?: CVE-2025-66863 was published on 2025-12-29 and last updated on 2026-06-17.

References

https://github.com/caozhzh/CRGF-Vul/blob/main/cxxfilt/crash2.md

Affected products (1)

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

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