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CVE-2026-121386— FreeRDP before 3.32.2 Denial of Service via WinPR PNG/JPEG Image Readers

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.

在 3.32.2 版本之前的 FreeRDP 存在一个拒绝服务漏洞，该漏洞源于 WinPR 组件中的和函数缺乏对 libpng 和 libjpeg 的错误处理机制。恶意 RDP 服务器或中间人（MITM）攻击者可提供畸变的 PNG 或截断的 JPEG 剪贴板载荷，导致客户端中止运行或退出。

CVSS 7.5 · High Updated Nov 03, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

Vendor	Product	Version Range	Status
FreeRDP	FreeRDP	`< 3.32.2`	affected
		`3.32.2`	unaffected

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Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

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Vulnerability Title

FreeRDP before 3.32.2 Denial of Service via WinPR PNG/JPEG Image Readers

Source: CVE Program / CVE List V5

Vulnerability Description

FreeRDP before 3.32.2 contains a denial of service vulnerability in WinPR's winpr_read_png_from_buffer() and winpr_convert_from_jpeg(), which lack libpng/libjpeg error handling. A malicious RDP server or MITM can offer a malformed PNG or truncated JPEG clipboard payload, causing the client to abort or exit.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

未捕获的异常

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
FreeRDP	FreeRDP	0 ~ 3.32.2	-

II. Public POCs for CVE-2026-121386

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-121386

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Other References for CVE-2026-121386 (2)

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-799q-hjgw-g55g vendor-advisory
https://www.vulncheck.com/advisories/freerdp-before-3.32.2-denial-of-service-via-winpr-png-jpeg-image-readers third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-121386

Same Patch Batch · FreeRDP · 2026-11-03 · 27 CVEs total

CVE-2026-121392	7.4 HIGH	FreeRDP before 3.32.2 Certificate Identity Validation Bypass via tls_verify_certificate
CVE-2026-121395	6.5 MEDIUM	FreeRDP 3.17.0 before 3.32.2 Denial of Service via RemoteFX Decoder
CVE-2026-121400	6.5 MEDIUM	FreeRDP before 3.32.2 CPU Exhaustion via RDG Control Packet
CVE-2026-121404	6.5 MEDIUM	FreeRDP before 3.32.2 Shadow Server CPU Exhaustion via Zero-Length DVC DATA
CVE-2026-121412	6.5 MEDIUM	FreeRDP 3.0.0 before 3.32.2 Proxy Memory Exhaustion via DVC Reassembly
CVE-2026-121407	6.5 MEDIUM	FreeRDP before 3.32.2 Shadow Server Denial of Service via remdesk Channel
CVE-2026-121393	6.5 MEDIUM	FreeRDP 3.0.0 before 3.32.2 Denial of Service via RemoteFX Region Assertion
CVE-2026-121402	6.5 MEDIUM	FreeRDP before 3.32.2 X11 Client Crash via Zero-Width RDPGFX ResetGraphics
CVE-2026-121394	6.5 MEDIUM	FreeRDP before 3.32.2 Denial of Service via RemoteFX RLGR decoder
CVE-2026-121388	6.5 MEDIUM	FreeRDP 3.0.0 before 3.32.2 Uncapped Memory Allocation via DRDYNVC DATA_FIRST
CVE-2026-121409	5.9 MEDIUM	FreeRDP before 3.32.2 Denial of Service via Oversized X.224 Routing Token
CVE-2026-121398	5.9 MEDIUM	FreeRDP before 3.32.2 Use-After-Free via dyn-channel-dump Module
CVE-2026-121408	5.3 MEDIUM	FreeRDP before 3.32.2 Use-After-Free via USB Redirection Control Channel
CVE-2026-121390	4.3 MEDIUM	FreeRDP before 3.32.2 Null Pointer Crash via ARM Gateway Response
CVE-2026-121396	4.3 MEDIUM	FreeRDP 3.0.0 before 3.32.2 denial of service via RTS padding assertion
CVE-2026-121391	4.3 MEDIUM	FreeRDP before 3.32.2 File Descriptor Exhaustion via Parallel CREATE
CVE-2026-121410	4.3 MEDIUM	FreeRDP before 3.32.2 Denial of Service via RDPGFX ALPHA WIRETOSURFACE_2
CVE-2026-121399	4.3 MEDIUM	FreeRDP before 3.32.2 Memory Exhaustion via RD Gateway Packet Length
CVE-2026-121397	4.3 MEDIUM	FreeRDP before 3.32.2 Heap Over-Read via WinPR save_png_to_buffer()
CVE-2026-121403	4.3 MEDIUM	FreeRDP before 3.32.2 Denial of Service via Malformed Drive IRP

Showing top 20 of 27 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: FreeRDP

Same vendor: FreeRDP

Same weakness: CWE-248