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CVE-2026-26271— Buffer Overread in FreeRDP Icon Processing

Quick assessment

Affected
FreeRDP FreeRDP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreeRDP是FreeRDP团队的一款开源的远程桌面协议（RDP）的实现。 FreeRDP 3.23.0之前版本存在安全漏洞，该漏洞源于freerdp_image_copy_from_icon_data函数存在缓冲区过度读取，可能导致处理特制的RDP窗口图标数据时触发漏洞。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.24% · P15

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-26271

Vulnerability Information
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Vulnerability Title
Buffer Overread in FreeRDP Icon Processing
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a buffer overread in `freerdp_image_copy_from_icon_data()` (libfreerdp/codec/color.c) can be triggered by crafted RDP Window Icon (TS_ICON_INFO) data. The bug is reachable over the network when a client processes icon data from an RDP server (or from a man-in-the-middle). Version 3.23.0 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
缓冲区上溢读取
Source: CVE Program / CVE List V5
Vulnerability Title
FreeRDP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeRDP是FreeRDP团队的一款开源的远程桌面协议（RDP）的实现。 FreeRDP 3.23.0之前版本存在安全漏洞，该漏洞源于freerdp_image_copy_from_icon_data函数存在缓冲区过度读取，可能导致处理特制的RDP窗口图标数据时触发漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreeRDP FreeRDP < 3.23.0 -

II. Public POCs for CVE-2026-26271

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III. Intelligence Information for CVE-2026-26271

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Same Patch Batch · FreeRDP · 2026-02-25 · 15 CVEs total

CVE-2026-26955 8.8 HIGH FreeRDP has Out-of-bounds Write
CVE-2026-26965 8.8 HIGH FreeRDP has Out-of-bounds Write
CVE-2026-27951 5.3 MEDIUM FreeRDP has possible Integer overflow in Stream_EnsureCapacity
CVE-2026-25941 4.3 MEDIUM FreeRDP: vuln_1_15_1 RDPGFX WIRE_TO_SURFACE_2 Out-of-Bounds Read
CVE-2026-25942 FreeRDP has global-buffer-overflow in xf_rail_server_execute_result
CVE-2026-25953 FreeRDP has heap-use-after-free in xf_AppUpdateWindowFromSurface (freed appWindow)
CVE-2026-25952 FreeRDP has heap-use-after-free in xf_SetWindowMinMaxInfo
CVE-2026-25959 FreeRDP has heap-use-after-free in xf_cliprdr_provide_data_
CVE-2026-25997 FreeRDP has heap-use-after-free in xf_clipboard_format_equal
CVE-2026-25955 FreeRDP has heap-use-after-free in xf_AppUpdateWindowFromSurface (stale XImage)
CVE-2026-25954 FreeRDP has heap-use-after-free in xf_rail_server_local_move_size
CVE-2026-27015 FreeRDP: Smartcard NDR Alignment Padding Triggers Reachable WINPR_ASSERT Abort (Client DoS
CVE-2026-26986 FreeRDP has heap-use-after-free in rail_window_free
CVE-2026-27950 FreeRDP heap-use-after-free in update_pointer_new(SDL): Fix Applied in the Wrong File

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-126

V. Comments for CVE-2026-26271

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