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Vulnerabilities

Vulnerability · CVE-2026-23512

SumatraPDF is a multi-format reader for Windows.

Published Jan 14, 2026 · catalog updated Jan 14, 2026 · SumatraPDF is a multi-format

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-23512. EPSS is 0.23%. Act only if a listed version of SumatraPDF is a multi-format is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (SumatraPDF is a multi-format).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.6
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.23%
Remediation
Advisory link
Affected products
vendor sumatrapdfreader sumatrapdf ≤ 3.5.2

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor sumatrapdfreader sumatrapdf ≤ 3.5.2≤ 3.5.2

How to fix CVE-2026-23512

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-23512. EPSS is 0.23%. Act only if a listed version of SumatraPDF is a multi-format is installed.

Which versions are affected?

Compare what you have installed with sumatrapdfreader sumatrapdf ≤ 3.5.2 ≤ 3.5.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.23%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Windows security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 14, 2026 · EUVD

    Detected

    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 ar

  2. Jan 14, 2026 · EUVD

    Updated

    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 ar

Sources

  • CVE.orgVulnerability recordCVE-2026-23512

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-23512

    30-day exploitation probability 0.23%

    first.org
  • EUVDVulnerability recordEUVD-2026-2675

    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 Win

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 6, 2026
  • CVE.orgOct 30, 2026
  • EUVDOct 30, 2026