Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-45700— Heap-buffer-overflow write in planar bitmap decoder

Quick assessment

Affected
FreeRDP FreeRDP
Exploitation
Public or AI PoC available; prioritize validation
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 3.26.0之前版本存在缓冲区错误漏洞，该漏洞源于平面位图解码器在解码RLE平面数据时存在堆越界写入，攻击者可通过大的nDstStep和nXDst绕过检查，导致写入超出内部临时缓冲区末尾。

CVSS 7.7 · High EPSS 0.78% · P54

Affected Version Matrix 1

VendorProduct Version RangeStatus
FreeRDP FreeRDP < 3.26.0 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-45700

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Heap-buffer-overflow write in planar bitmap decoder
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, FreeRDP's planar bitmap decoder has an out-of-bounds heap write when decoding RLE planar data. In libfreerdp/codec/planar.c, freerdp_bitmap_decompress_planar() validates the X destination coordinate nXDst against the caller-provided destination stride (nDstStep) even when it is writing into the internal temp buffer pTempData. An attacker can bypass the check with a large nDstStep and a large nXDst, causing planar_decompress_plane_rle() to write past the end of pTempData. This vulnerability is fixed in 3.26.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
FreeRDP 缓冲区错误漏洞
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 3.26.0之前版本存在缓冲区错误漏洞，该漏洞源于平面位图解码器在解码RLE平面数据时存在堆越界写入，攻击者可通过大的nDstStep和nXDst绕过检查，导致写入超出内部临时缓冲区末尾。
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 < 3.26.0 -

II. Public POCs for CVE-2026-45700

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 11688 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-45700

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-45700 (1)

Same Patch Batch · FreeRDP · 2026-05-29 · 4 CVEs total

CVE-2026-44420 8.8 HIGH FreeRDP cliprdr server heap-buffer-overflow via undersized capabilitySetLength in CB_CLIP_
CVE-2026-44421 8.8 HIGH FreeRDP RDPGFX CacheToSurface heap-buffer-overflow via clamped-rectangle validation bypass
CVE-2026-44422 7.5 HIGH FreeRDP RDPEAR NDR ref-id aliasing causes client-side UAF/double-free and type confusion

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-787

V. Comments for CVE-2026-45700

No comments yet

Leave a comment