SARA / Free Tools / KEV / CVE-2025-52691

CVE-2025-52691: Used in ransomware campaigns — CISA KEV

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 KEV — Actively Exploited

Successful exploitation of the vulnerability could allow an unauthenticated attacker to upload arbitrary files to any lo

Vendor / Product
— / —
Added to KEV
—
BOD 22-01 due
—
Ransomware use
Known
CVSS / EPSS
10.0 — · EPSS —

01What CISA says about this vulnerability

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.

02Required action — verbatim from CISA

- CISA KEV: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

03Notes & references

No additional references available in the KB record.

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

No structured affected-product list available — see references below for vendor advisories.

06Detection

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