CVE-2024-32662Network attack vector

Certificate-comparison integrity loss via WCHAR length confusion

Published Apr 23, 2024 · Updated Feb 13, 2025

Out-of-bounds read in FreeRDP clients 3.0.0 through 3.5.0 allows remote attackers to corrupt redirection-certificate comparison. The rdp_redirection_read_base64_wchar function passes a byte length as a WCHAR count to ConvertWCharNToUtf8Alloc, causing conversion to read twice the intended buffer before Base64 decoding. A crafted server redirection string reaches the flaw before the decoded value is compared with the redirection server certificate, limiting the documented consequence to the integrity of that comparison.

CVSS severity7.5
High
EPSS probability0.77%
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 3.0.0 through 3.5.0 allows remote attackers to corrupt redirection-certificate comparison. The rdp_redirection_read_base64_wchar function passes a byte length as a WCHAR count to ConvertWCharNToUtf8Alloc, causing conversion to read twice the intended buffer before Base64 decoding. A crafted server redirection string reaches the flaw before the decoded value is compared with the redirection server certificate, limiting the documented consequence to the integrity of that comparison.

The record

CVE
CVE-2024-32662
Published
Apr 23, 2024
Updated
Feb 13, 2025
Vendor
FreeRDP
Product
FreeRDP
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 23, 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

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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=0 <3.5.1
  2. Affected versionversion=< 3.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

FreeRDP · FreeRDPversion=0 <3.5.1; version=< 3.5.1

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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.

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Technologies

Your stack

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Your stack

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