EIP-2026-117490

PRE-CVE

Microsoft Fax - Cover Page Editor 5.2.3790.3959 Double-Free Memory Corruption

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-117490. PoCs published by Luigi Auriemma.

AI-analyzed exploit summary The document provides a detailed technical analysis of a double-free vulnerability in Microsoft Fax Cover Page Editor (fxscover.exe) affecting versions <= 5.2.3790.3959. It explains the root cause involving a 16-bit field used to index 'Text' elements, which can be manipulated to trigger a double-free condition during object deallocation, potentially leading to code execution.

Description

Microsoft Fax - Cover Page Editor 5.2.3790.3959 Double-Free Memory Corruption

Exploits (1)

exploitdb WRITEUP VERIFIED
by Luigi Auriemma · textlocalwindows
https://www.exploit-db.com/exploits/16024

The document provides a detailed technical analysis of a double-free vulnerability in Microsoft Fax Cover Page Editor (fxscover.exe) affecting versions <= 5.2.3790.3959. It explains the root cause involving a 16-bit field used to index 'Text' elements, which can be manipulated to trigger a double-free condition during object deallocation, potentially leading to code execution.

Classification
Writeup 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Theoretical
Target: Microsoft Fax Cover Page Editor <= 5.2.3790.3959
No auth needed
Prerequisites: Fax Service installed on Windows · Ability to deliver a malicious .cov file to the target system
devstral-2 · analyzed Feb 19, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026