What’s Vulnerable › Vulnerabilities

CVE-2026-55013: Windows Remote Help Defense Spoofing Vulnerability

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-20 · updated 2026-10-30
• Weakness: CWE-427

Description

Uncontrolled search path element in Windows Remote Help Defense allows an authorized attacker to perform spoofing locally.

Affected products

• Microsoft Windows Remote Help: before 5.2.1040.0 — fixed in 5.2.1040.0
• Microsoft Windows Remote Help: from 5.0.0.0 before 5.2.1040.0 — fixed in 5.2.1040.0

How to fix

Upgrade to a fixed version: Microsoft Windows Remote Help 5.2.1040.0; Microsoft Windows Remote Help 5.2.1040.0. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55013

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