CVE-2024-32041Network attack vector

Client memory overread via unchecked ZGFX count

Published Apr 22, 2024 · Updated Feb 13, 2025

Out-of-bounds read in FreeRDP clients before 2.11.6 and 3.0.0 through 3.4.0 allows remote attackers to read process memory. The zgfx_decompress_segment function copies an unencoded byte count from the current input pointer without first ensuring that the requested bytes remain in the input stream. Triggering requires a client to process crafted graphics data from an RDP server with GFX enabled, which is the default.

CVSS severity9.8
Critical
EPSS probability1.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in FreeRDP clients before 2.11.6 and 3.0.0 through 3.4.0 allows remote attackers to read process memory. The zgfx_decompress_segment function copies an unencoded byte count from the current input pointer without first ensuring that the requested bytes remain in the input stream. Triggering requires a client to process crafted graphics data from an RDP server with GFX enabled, which is the default.

The record

CVE
CVE-2024-32041
Published
Apr 22, 2024
Updated
Feb 13, 2025
Vendor
FreeRDP
Product
FreeRDP
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <2.11.6
  2. Affected versionversion=< 2.11.6
  3. Affected versionversion=>= 3.0.0, 3.5.0
  4. Affected versionversion=3.0.0 <=3.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FreeRDP · FreeRDPversion=0 <2.11.6; version=< 2.11.6; version=>= 3.0.0, 3.5.0; version=3.0.0 <=3.5.0

Published CVSS scores

9.8GitHub CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.3SUSECVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

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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