CVE-2026-29775Public exploitNetwork attack vector

Client crash via bitmap-cache off-by-one

Published Mar 13, 2026 · Updated Mar 13, 2026

Heap out-of-bounds access in FreeRDP before 3.24.0 allows remote attackers controlling an RDP server to crash connected clients. bitmap_cache_put accepts cacheId equal to maxCells, then reads and potentially writes cells[] one element beyond its allocation. The client must connect to the server; the demonstrated result is a crash and heap corruption, while code execution depends on heap layout.

CVSS severity5.3
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap out-of-bounds access in FreeRDP before 3.24.0 allows remote attackers controlling an RDP server to crash connected clients. bitmap_cache_put accepts cacheId equal to maxCells, then reads and potentially writes cells[] one element beyond its allocation. The client must connect to the server; the demonstrated result is a crash and heap corruption, while code execution depends on heap layout.

The record

CVE
CVE-2026-29775
Published
Mar 13, 2026
Updated
Mar 13, 2026
Vendor
FreeRDP
Product
FreeRDP
Classifications
CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.24.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FreeRDP · FreeRDPversion=< 3.24.0

Published CVSS scores

8.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
5.3GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
6.3Amazon LinuxCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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