EIP-2026-118863

PRE-CVE

Microsoft Outlook Express 5/6 - Script Execution

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-118863. PoCs published by http-equiv.

AI-analyzed exploit summary This exploit leverages a re-introduced vulnerability in Microsoft Outlook Express, allowing arbitrary JavaScript execution via a malformed MIME email with an `<img>` tag using the `dynsrc` attribute. The PoC demonstrates an XSS-like attack vector through email rendering.

Description

Microsoft Outlook Express 5/6 - Script Execution

Exploits (1)

exploitdb WORKING POC VERIFIED
by http-equiv · textremotewindows
https://www.exploit-db.com/exploits/22959

This exploit leverages a re-introduced vulnerability in Microsoft Outlook Express, allowing arbitrary JavaScript execution via a malformed MIME email with an `<img>` tag using the `dynsrc` attribute. The PoC demonstrates an XSS-like attack vector through email rendering.

Classification
Working Poc 90%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: Microsoft Outlook Express (version unspecified, likely pre-2006)
No auth needed
Prerequisites: Victim must open the malicious email in a vulnerable version of Outlook Express
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026