CVE-2025-66861: BinUtils · Uncontrolled Resource Consumption
Source CVE Database V5
Not known to be exploited · CVSS 2.5 Low.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:LExploitation evidence
Disclosed: evidence found.
CVE published 29 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
- Restrict access to systems and user accounts that have BinUtils 2.26 installed, limiting usage to trusted personnel only.
- Implement strict file handling policies to prevent untrusted or suspicious PE files from being processed by BinUtils tools.
- Monitor system logs and process behavior for signs of crashes or hangs related to BinUtils usage, enabling rapid detection of exploitation attempts.
- Use sandboxing or containerization to isolate BinUtils processes, minimizing the impact of potential crashes on broader systems.
- Educate users about the risks of opening or processing untrusted PE files, reducing the likelihood of user interaction exploitation.
- Track vendor advisories and apply patches or updates promptly once they become available to remediate the vulnerability definitively.
- Consider upgrading to newer versions of BinUtils if they are confirmed not vulnerable or contain fixes for this issue.
- Employ application whitelisting to control execution of BinUtils binaries and related tools.
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.