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CVE-2026-25880— Untrusted Search Path in SumatraPDF Reader (explorer.exe on Windows)

Quick assessment

Affected
sumatrapdfreader sumatrapdf
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.

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PDF阅读器允许执行与打开的PDF位于同一目录中的恶意二进制文件，可能导致任意代码执行。

CVSS 7.8 · High EPSS 0.23% · P13
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I. Basic Information for CVE-2026-25880

Vulnerability Information
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Vulnerability Title
Untrusted Search Path in SumatraPDF Reader (explorer.exe on Windows)
Source: CVE Program / CVE List V5
Vulnerability Description
SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, the PDF reader allows execution of a malicious binary (explorer.exe) located in the same directory as the opened PDF when the user clicks File → “Show in folder”. This behavior leads to arbitrary code execution on the victim’s system with the privileges of the current user, without any warning or user interaction beyond the menu click.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/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PDF阅读器允许执行与打开的PDF位于同一目录中的恶意二进制文件，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-2026-25880

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III. Intelligence Information for CVE-2026-25880

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Vendor Advisories for CVE-2026-25880 (1)

Same Patch Batch · sumatrapdfreader · 2026-02-09 · 3 CVEs total

CVE-2026-25961 7.5 HIGH SumatraPDF Update MITM -> Arbitrary Code Execution
CVE-2026-25920 5.5 MEDIUM SumatraPDF has a heap out-of-bounds read in MOBI HuffDic decompressor

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-25880

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