---
title: "CVE-2026-111880: FreeRDP - Out of Bounds Read/Write"
description: "FreeRDP >= 2.0.0 < 3.32.0 contains a heap out-of-bounds write caused by improper validation of MIC offset in server hash-callback NTLM path, letting unauthenticated attackers write beyond allocation via crafted AUTHENTICATE_MESSAGE."
url: https://panop.io/threat-heartbeat/CVE-2026-111880/
---

# CVE-2026-111880 FreeRDP - Out of Bounds Read/Write

FreeRDP >= 2.0.0 < 3.32.0 contains a heap out-of-bounds write caused by improper validation of MIC offset in server hash-callback NTLM path, letting unauthenticated attackers write beyond allocation via crafted AUTHENTICATE\_MESSAGE.

CVSS base score 7.4 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.32% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-111880)

## Details

Type

Out-of-bounds Read/Write

Impact

Denial of Service

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H

Published

17 October 2026

Updated

19 October 2026

Weakness

[CWE-787](https://cwe.mitre.org/data/definitions/787.html)

## Vendor fix

Update to version 3.32.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-111880](https://nvd.nist.gov/vuln/detail/CVE-2026-111880)
- [https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cmgx-558f-vh67](https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-cmgx-558f-vh67)
- [https://www.vulncheck.com/advisories/freerdp-2.0.0-before-3.32.0-heap-out-of-bounds-write-via-ntlm-mic-offset](https://www.vulncheck.com/advisories/freerdp-2.0.0-before-3.32.0-heap-out-of-bounds-write-via-ntlm-mic-offset)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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