Is CVE-2025-26787 in the CISA KEV catalog?

No. CVE-2025-26787 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-26787?

CVE-2025-26787 has a CVSS v3 base score of 4.7 (MEDIUM).

What is the EPSS score for CVE-2025-26787?

CVE-2025-26787 has an EPSS score of 0.13% (3th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-26787?

Upgrade signserver to 7.2 or later.

CVE & CISA-KEV Catalog

CVE-2025-26787

MEDIUM

4.7

CVSS v3

NVD

Description

An error in the SignServer container startup logic was found in Keyfactor SignServer versions prior to 7.2. The Admin CLI command used to configure Certificate access to the initial startup of the container sets a property of "allowany" to allow any user with a valid and trusted client auth certificate to connect. Admins can then set more restricted access to specific certificates. A logic error caused this admin CLI command to be run on each restart of the container instead of only the first startup as intended resetting the configuration to "allowany".

CWE-642

How to fix

Remediation Available

signserverNVD

Affected:< 7.2Fixed in:7.2CVE-2025-26787derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

0.13%probability of exploitation in 30 days

3rdpercentile

Low risk: more likely to be exploited than 3% of all known CVEs.

References

Vendor Advisory1

support.keyfactor.com

Release Notes1

docs.keyfactor.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-01-05.