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CVE Vulnerability Details :
CVE-2026-23732
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-19 Jan, 2026 | 17:12
Updated At-20 Jan, 2026 | 15:34
Rejected At-
▼CVE Numbering Authority (CNA)
FreeRDP has heap-buffer-overflow in Glyph_Alloc

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.

Affected Products
Vendor
FreeRDPFreeRDP
Product
FreeRDP
Versions
Affected
  • < 3.21.0
Problem Types
TypeCWE IDDescription
CWECWE-122CWE-122: Heap-based Buffer Overflow
Type: CWE
CWE ID: CWE-122
Description: CWE-122: Heap-based Buffer Overflow
Metrics
VersionBase scoreBase severityVector
4.05.5MEDIUM
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/E:P
Version: 4.0
Base score: 5.5
Base severity: MEDIUM
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/E:P
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-7qxp-j2fj-c3pp
x_refsource_CONFIRM
https://github.com/FreeRDP/FreeRDP/blob/f96ee2a6dd02739325c2a4e36a14978b561f00ea/libfreerdp/cache/glyph.c#L463-L480
x_refsource_MISC
https://github.com/FreeRDP/FreeRDP/blob/f96ee2a6dd02739325c2a4e36a14978b561f00ea/libfreerdp/codec/color.c#L261-L277
x_refsource_MISC
https://github.com/FreeRDP/FreeRDP/blob/f96ee2a6dd02739325c2a4e36a14978b561f00ea/libfreerdp/core/graphics.c#L138
x_refsource_MISC
https://github.com/FreeRDP/FreeRDP/blob/f96ee2a6dd02739325c2a4e36a14978b561f00ea/libfreerdp/core/orders.c#L2186C17-L2199
x_refsource_MISC
https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0
x_refsource_MISC
Hyperlink: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-7qxp-j2fj-c3pp
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/FreeRDP/FreeRDP/blob/f96ee2a6dd02739325c2a4e36a14978b561f00ea/libfreerdp/cache/glyph.c#L463-L480
Resource:
x_refsource_MISC
Hyperlink: https://github.com/FreeRDP/FreeRDP/blob/f96ee2a6dd02739325c2a4e36a14978b561f00ea/libfreerdp/codec/color.c#L261-L277
Resource:
x_refsource_MISC
Hyperlink: https://github.com/FreeRDP/FreeRDP/blob/f96ee2a6dd02739325c2a4e36a14978b561f00ea/libfreerdp/core/graphics.c#L138
Resource:
x_refsource_MISC
Hyperlink: https://github.com/FreeRDP/FreeRDP/blob/f96ee2a6dd02739325c2a4e36a14978b561f00ea/libfreerdp/core/orders.c#L2186C17-L2199
Resource:
x_refsource_MISC
Hyperlink: https://github.com/FreeRDP/FreeRDP/releases/tag/3.21.0
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-7qxp-j2fj-c3pp
exploit
Hyperlink: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-7qxp-j2fj-c3pp
Resource:
exploit
Details not found