Critical RCE vulnerability in Disig Web Signer

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-8931
StatePUBLISHED
AssignerSK-CERT
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-01 15:16:39 UTC
Updated2026-06-01 15:16:39 UTC
DescriptionA critical Remote Code Execution (RCE) vulnerability exists in Disig Web Signer versions 2.0.3 through 2.5.3.

Risk And Classification

Primary CVSS: v4.0 9.4 CRITICAL from [email protected]

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/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

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary9.4CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/C...
4.0CNACVSS9.4CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Passive
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
High
Sub Integrity
High
Sub Availability
High

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/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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Disig Web Signer affected 2.0.3 2.5.3 custom Not specified
CNA Disig Web Signer unaffected 2.5.5 Not specified

References

ReferenceSourceLinkTags
www.disig.sk/en/news/important-update-of-the-web-signer-application [email protected] www.disig.sk
qesportal.sk/Portal/en/Info/News [email protected] qesportal.sk
download.disigcdn.sk/cdn/products/websigner2/changelog.en.txt [email protected] download.disigcdn.sk
download.disigcdn.sk/cdn/products/websigner2/changelog.sk.txt [email protected] download.disigcdn.sk
www.disig.sk/sk/aktuality/dolezita-aktualizacia-aplikacie-web-signer [email protected] www.disig.sk
qesportal.sk/Portal/sk/Info/News [email protected] qesportal.sk
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Marek Alakša of Binary House (en)

© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report