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CVE-2026-23512— SumatraPDF has an Untrusted Search Path in sumatrapdf/src/AppTools.cpp

Quick assessment

Affected
sumatrapdfreader sumatrapdf
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.

sumatrapdf是sumatrapdfreader开源的一个PDF阅读器。 sumatrapdf 3.5.2及之前版本存在代码问题漏洞，该漏洞源于执行notepad.exe时未指定绝对路径，可能导致任意代码执行。

CVSS 8.6 · High EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1574.001 · DLL
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I. Basic Information for CVE-2026-23512

Vulnerability Information
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Vulnerability Title
SumatraPDF has an Untrusted Search Path in sumatrapdf/src/AppTools.cpp
Source: CVE Program / CVE List V5
Vulnerability Description
SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, there is a Untrusted Search Path vulnerability when Advanced Options setting is trigger. The application executes notepad.exe without specifying an absolute path when using the Advanced Options setting. On Windows, this allows execution of a malicious notepad.exe placed in the application's installation directory, leading to arbitrary code execution.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不可信的搜索路径
Source: CVE Program / CVE List V5
Vulnerability Title
sumatrapdf 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
sumatrapdf是sumatrapdfreader开源的一个PDF阅读器。 sumatrapdf 3.5.2及之前版本存在代码问题漏洞，该漏洞源于执行notepad.exe时未指定绝对路径，可能导致任意代码执行。
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
sumatrapdfreader sumatrapdf <= 3.5.2 -

II. Public POCs for CVE-2026-23512

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 9730 chars
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III. Intelligence Information for CVE-2026-23512

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IV. Related Vulnerabilities

Same product: sumatrapdf
Same vendor: sumatrapdfreader
Same weakness: CWE-426

V. Comments for CVE-2026-23512

Anonymous User
2026-01-15 06:08:07

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