CVE-2026-111880

High

Description

FreeRDP versions from 2.0.0 before 3.32.0 contain a heap out-of-bounds write in the server hash-callback NTLM path that fails to validate the MIC offset. Unauthenticated attackers can send a crafted AUTHENTICATE_MESSAGE with a backward session-key offset and MIC offset to write 16 zero bytes beyond the allocation.

SeverityHigh

CVSS7.4

Exploit probability—

ProductFreeRDP

PublishedOct 17, 2026

First seenOct 17, 2026

Weakness typeCWE-787Out-of-bounds write

How to fix

Update

FreeRDP FreeRDP3.32.0 or later

Vendor advisories

github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cmgx-558f-vh67

Affected products

Product	Affected versions	Fixed in
FreeRDP FreeRDP	2.0.0 ≤ v < 3.32.0	3.32.0

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