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

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Passive

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Disig Web Signer unaffected
Version Status Constraints
2.0.3 affected ≤ 2.5.3
2.5.5 unaffected —

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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

Mon, 01 Jun 2026 16:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-94
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Mon, 01 Jun 2026 15:00:00 +0000

Type Values Removed Values Added
Description A critical Remote Code Execution (RCE) vulnerability exists in Disig Web Signer versions 2.0.3 through 2.5.3.
Title Critical RCE vulnerability in Disig Web Signer
References
Metrics cvssV4_0

{'score': 9.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: SK-CERT

Published:

Updated: 2026-06-01T15:31:51.875Z

Reserved: 2026-05-19T08:34:36.546Z

Link: CVE-2026-8931

cve-icon Vulnrichment

Updated: 2026-06-01T15:31:43.494Z

cve-icon NVD

Status : Received

Published: 2026-06-01T15:16:39.220

Modified: 2026-06-01T15:16:39.220

Link: CVE-2026-8931

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses