CVE-2026-23732 — Heap-based Buffer Overflow in Freerdp

CWE-122 — Heap-based Buffer Overflow7 documents7 sources
Severity
5.5MEDIUMNVD
EPSS
0.1%
top 67.10%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
FreerdpDebian Freerdp2Debian Freerdp3
Timeline
PublishedJan 19
Latest updateMar 18

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.21.0, FastGlyph parsing trusts `cbData`/remaining length and never validates against the minimum size implied by `cx/cy`. A malicious server can trigger a client‑side global buffer overflow, causing a crash (DoS). Version 3.21.0 contains a patch for the issue.

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Affected Packages3 packages

▶NVDfreerdp/freerdp< 3.21.0
▶debiandebian/freerdp2< freerdp3 3.21.0+dfsg-1 (forky)
▶debiandebian/freerdp3< freerdp3 3.21.0+dfsg-1 (forky)

🔴Vulnerability Details

1
OSV
CVE-2026-23732: FreeRDP is a free implementation of the Remote Desktop Protocol↗2026-01-19
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📋Vendor Advisories

3
Ubuntu
FreeRDP vulnerabilities↗2026-03-18
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Red Hat
freerdp: FreeRDP: Denial of Service via FastGlyph parsing buffer overflow↗2026-01-19
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Debian
CVE-2026-23732: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to versio...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-23732 Impact, Exploitability, and Mitigation Steps | Wiz↗
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💬Community

1
Bugzilla
CVE-2026-23732 freerdp: FreeRDP: Denial of Service via FastGlyph parsing buffer overflow↗2026-01-19
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