Paper/Archive/CVE-2026-8931

CVE-2026-8931

Disig Web Signer — Critical RCE vulnerability in Disig Web Signer

EPSS 0.7%CVSS 9.4

critical.is priorityof 100

39

CVSS 9.4 (CNA)9.4 / 10 × 3028.2 Not in CISA KEV+300.0 EPSS percentile 53.9.539 × 2010.8 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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

Affected

ProductAffectedFixed inSource

Web Signer2.0.3 – 2.5.32.5.5CNA

Scores by source

SK-CERT (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refdisig.sk/en/news/important-update-of-the-web-signer-application refdisig.sk/sk/aktuality/dolezita-aktualizacia-aplikacie-web-signer refdownload.disigcdn.sk/cdn/products/websigner2/changelog.en.txt refdownload.disigcdn.sk/cdn/products/websigner2/changelog.sk.txt refqesportal.sk/Portal/en/Info/News#websigner255 refqesportal.sk/Portal/sk/Info/News#websigner255