Is CVE-2025-52691 in the CISA KEV catalog?

Yes. CVE-2025-52691 is on the CISA Known Exploited Vulnerabilities list, added 2026-01-26, and has known ransomware campaign use.

What is the CVSS severity of CVE-2025-52691?

CVE-2025-52691 has a CVSS v3 base score of 10.0 (CRITICAL).

What is the EPSS score for CVE-2025-52691?

CVE-2025-52691 has an EPSS score of 85.46% (100th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2025-52691

CRITICALCISA KEVEPSS 100th pctl

10.0

CVSS v3

NVD

Description

Successful exploitation of the vulnerability could allow an unauthenticated attacker to upload arbitrary files to any location on the mail server, potentially enabling remote code execution.

CWE-434Unrestricted File Upload

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

85.46%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Remediation due: 2026-02-16

Associated with ransomware campaigns

References

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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 2026-01-27.