How severe is CVE-2026-25880?

CVE-2026-25880 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-25880 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25880?

CVE-2026-25880 affects Sumatrapdfreader Sumatrapdf. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25880?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-25880 have an EU (EUVD) identifier?

Yes. CVE-2026-25880 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6861.

When was CVE-2026-25880 published?

CVE-2026-25880 was published on 2026-02-09 and last updated on 2026-06-17.

CVE-2026-25880

CVE-2026-25880 is a high-severity vulnerability in Sumatrapdfreader Sumatrapdf with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-426.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6861
Weakness: CWE-426
Affected product: Sumatrapdfreader Sumatrapdf
Published: 2026-02-09
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-25880?: CVE-2026-25880 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-25880 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25880?: CVE-2026-25880 affects Sumatrapdfreader Sumatrapdf. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25880?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-25880 have an EU (EUVD) identifier?: Yes. CVE-2026-25880 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6861.
When was CVE-2026-25880 published?: CVE-2026-25880 was published on 2026-02-09 and last updated on 2026-06-17.

References

https://github.com/sumatrapdfreader/sumatrapdf/security/advisories/GHSA-5x4h-247q-px37

Affected products (1)

cpe:2.3:a:sumatrapdfreader:sumatrapdf:*:*:*:*:*:*:*:*

More vulnerabilities in Sumatrapdfreader Sumatrapdf

CVE-2012-4896 — Critical (CVSS 9.3): Heap-based buffer overflow in SumatraPDF before 2.1 allows remote attackers to execute arbitrary code via a crafted PDF…
CVE-2012-4895 — Critical (CVSS 9.3): Heap-based buffer overflow in SumatraPDF before 2.1 allows remote attackers to execute arbitrary code via a crafted PDF…
CVE-2009-4117 — Critical (CVSS 9.3): Multiple stack-based buffer overflows in pdf_shade4.c in MuPDF before commit 20091125231942, as used in SumatraPDF…
CVE-2026-23512 — High (CVSS 8.6): SumatraPDF is a multi-format reader for Windows. In 3.5.2 and earlier, there is a Untrusted Search Path vulnerability…
CVE-2012-5340 — High (CVSS 7.8): SumatraPDF 2.1.1/MuPDF 1.0 allows remote attackers to cause an Integer Overflow in the lex_number() function via a…
CVE-2013-2830 — High (CVSS 7.8): Use-after-free vulnerability in SumatraPDF Reader 2.x before 2.2.1 allows remote attackers to execute arbitrary code…

All CVEs affecting Sumatrapdfreader Sumatrapdf →

Other CWE-426 (Untrusted Search Path) vulnerabilities

CVE-2026-45772 — Critical (CVSS 9.8): Turborepo is a high-performance build system for JavaScript and TypeScript codebases. From 1.1.0 to before 2.9.14,…
CVE-2025-26155 — Critical (CVSS 9.8): NCP Secure Enterprise Client 13.18 and NCP Secure Entry Windows Client 13.19 have an Untrusted Search Path…
CVE-2024-53866 — Critical (CVSS 9.8): The package manager pnpm prior to version 9.15.0 seems to mishandle overrides and global cache: Overrides from one…
CVE-2024-38462 — Critical (CVSS 9.8): iRODS before 4.3.2 provides an msiSendMail function with a problematic dependency on the mail binary, such as in the…
CVE-2023-30330 — Critical (CVSS 9.8): SoftExpert (SE) Excellence Suite 2.x versions before 2.1.3 is vulnerable to Local File Inclusion in the function…
CVE-2022-24826 — Critical (CVSS 9.8): On Windows, if Git LFS operates on a malicious repository with a `..exe` file as well as a file named `git.exe`, and…

Browse all CWE-426 (Untrusted Search Path) vulnerabilities →