CVE-2026-25941Public exploitNetwork attack vector

Client memory disclosure and crash via unchecked length

Published Feb 25, 2026 · Updated Feb 25, 2026

An out-of-bounds read in FreeRDP before 2.11.8 on 2.x and before 3.23.0 on 3.x allows remote attackers to disclose client heap data. The rdpgfx_recv_wire_to_surface_2_pdu function trusts bitmapDataLength and advances the input stream without checking that the packet contains that many bytes. A user must connect the client to an attacker-controlled server; crafted RDPGFX data then exposes uninitialized heap contents or crashes the client, with no reported data modification.

CVSS severity4.3
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An out-of-bounds read in FreeRDP before 2.11.8 on 2.x and before 3.23.0 on 3.x allows remote attackers to disclose client heap data. The rdpgfx_recv_wire_to_surface_2_pdu function trusts bitmapDataLength and advances the input stream without checking that the packet contains that many bytes. A user must connect the client to an attacker-controlled server; crafted RDPGFX data then exposes uninitialized heap contents or crashes the client, with no reported data modification.

The record

CVE
CVE-2026-25941
Published
Feb 25, 2026
Updated
Feb 25, 2026
Vendor
FreeRDP
Product
FreeRDP
Classifications
CWE-125, CWE-20, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 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=>= 2.0.0, < 2.11.8
  2. Affected versionversion=>= 3.0.0, < 3.23.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FreeRDP · FreeRDPversion=>= 2.0.0, < 2.11.8; version=>= 3.0.0, < 3.23.0

Published CVSS scores

8.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
4.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-125Out-of-bounds Read
CWE-20Improper Input Validation
T1499.004Application or System Exploitation

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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