What is CVE-2026-25880?

CVE-2026-25880 is a high-severity vulnerability in Sumatrapdfreader Sumatrapdf, classified under Untrusted Search Path. CVSS score: 7.8/10. Published 2026-02-09.

How severe is CVE-2026-25880?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Sumatrapdfreader Sumatrapdf

CVE-2026-25880

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.

EPSS: 0.002 (9.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Sumatrapdfreader Sumatrapdf — versions <= 3.5.2

Weakness classification (CWE)

CWE-426 — Untrusted Search Path

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-25880?: CVE-2026-25880 is a high-severity vulnerability in Sumatrapdfreader Sumatrapdf, classified under Untrusted Search Path. CVSS score: 7.8/10. Published 2026-02-09.
How severe is CVE-2026-25880?: High severity. CVSS v3 base score is 7.8 out of 10.