What’s Vulnerable › Vulnerabilities

CVE-2026-8931: Critical RCE vulnerability in Disig Web Signer

• Severity: critical (CVSS 9.4 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-01 · updated 2026-07-22
• Weakness: CWE-94

Description

A critical Remote Code Execution (RCE) vulnerability exists in Disig Web Signer versions 2.0.3 through 2.5.3.

Affected products

• Disig Web Signer: from 2.0.3 through 2.5.3

References

• https://download.disigcdn.sk/cdn/products/websigner2/changelog.en.txt
• https://download.disigcdn.sk/cdn/products/websigner2/changelog.sk.txt
• https://qesportal.sk/Portal/en/Info/News#websigner255
• https://qesportal.sk/Portal/sk/Info/News#websigner255
• https://www.disig.sk/en/news/important-update-of-the-web-signer-application/
• https://www.disig.sk/sk/aktuality/dolezita-aktualizacia-aplikacie-web-signer/

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