CVE-2021-40855

CRITICAL

Published Jan 21, 20224y ago · Modified Jun 17, 20262w ago

9.8 CVSS 3.1

Critical

Published Jan 21, 2022 4y ago

Last Modified Jun 17, 2026 2w ago

Description

The EU Technical Specifications for Digital COVID Certificates before 1.1 mishandle certificate governance. A non-production public key certificate could have been used in production.

CVSS Details

Base Score

9.8

Exploitability

3.9

Impact

5.9

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector Network

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Unchanged

Confidentiality High

Integrity High

Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-295

Affected Products 1

Vendor	Product	Version	Range
europa	technical_specifications_for_digital_covid_certificates	*	<1.1

References 2

github.com https://github.com/eu-digital-green-certificates/dgc-overview/security/advisories/GHSA-xcvc-p4fw-qmcj

Third Party Advisory
consilium.europa.eu https://www.consilium.europa.eu/en/policies/coronavirus/eu-digital-covid-certificate/

ProductVendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.