CVE-2025-66866

HIGH

BinUtils 2.26 - Denial of Service via Crafted PE File in d_abi_tags Function

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2025-66866. PoCs published by hacker1337itme.

AI-analyzed exploit summary This repository contains a functional proof-of-concept exploit for CVE-2025-66866, a denial-of-service vulnerability in Binutils 2.26. The exploit generates a malicious PE file that triggers the vulnerability in the d_abi_tags function during demangling.

Description

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

Exploits (1)

nomisec WORKING POC
by hacker1337itme · poc
https://github.com/hacker1337itme/CVE-2025-66866

This repository contains a functional proof-of-concept exploit for CVE-2025-66866, a denial-of-service vulnerability in Binutils 2.26. The exploit generates a malicious PE file that triggers the vulnerability in the d_abi_tags function during demangling.

Classification
Working Poc 95%
Attack Type
Dos
Complexity
Moderate
Reliability
Reliable
Target: Binutils 2.26 (and possibly earlier)
No auth needed
Prerequisites: ability to deliver crafted PE file to target system · target system must use vulnerable Binutils version
devstral-2 · analyzed Mar 13, 2026 Full analysis →

References (1)

Core 1

Scores

CVSS v3 7.5
EPSS 0.0028
EPSS Percentile 19.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-20
Status published
Products (1)
gnu/binutils 2.26
Published Dec 29, 2025
Tracked Since Feb 18, 2026