CVE-2025-52691
CVSS v3
10
CRITICAL
EPSS Score
78.4 %
exploit probability
CISA KEV
Yes
known exploited
Exploitation
—
SSVC status
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.
CISA Known Exploited Vulnerability
- Date Added
- 2026-01-26
- Patch Due Date
- 2026-02-16
- Ransomware Use
- Unknown
Technical details
- Published
- 2025-12-29
Frequently asked questions
What is CVE-2025-52691?
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.
Is CVE-2025-52691 actively exploited?
Yes. CVE-2025-52691 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2/16/2026.
What is the CVSS score for CVE-2025-52691?
CVE-2025-52691 has a CVSS v3 base score of 10 (CRITICAL severity).
Is CVE-2025-52691 affecting your environment?
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