PT-2026-45442 · Unknown · Disig Web Signer

Marek Alakša · Published 2026-06-01 · Updated 2026-06-01 · CVE-2026-8931

Positive Technologies (AI Summary)

CVSS v4.0

9.4

Critical

Base vector

AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions Disig Web Signer versions 2.0.3 through 2.5.3

Description A critical Remote Code Execution (RCE) issue exists, which allows an attacker to execute arbitrary code on the target system remotely.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Code Injection

Weakness Enumeration

CWE-94

Related Identifiers

CVE-2026-8931

Affected Products

Disig Web Signer

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-8931 · Security Note
• https://download.disigcdn.sk/cdn/products/websigner2/changelog.en.txt · Note
• https://qesportal.sk/Portal/en/Info/News#websigner255 · Note
• https://disig.sk/en/news/important-update-of-the-web-signer-application · Note
• https://twitter.com/VulmonFeeds/status/2061475436828185041 · Twitter Post
• https://download.disigcdn.sk/cdn/products/websigner2/changelog.sk.txt · Note
• https://disig.sk/sk/aktuality/dolezita-aktualizacia-aplikacie-web-signer · Note
• https://qesportal.sk/Portal/sk/Info/News#websigner255 · Note