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Vulnerabilities

Vulnerability · CVE-2025-64667

User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

Published Dec 9, 2025 · catalog updated Oct 14, 2026 · exchange server

Check if you run it

No confirmed exploitation is on record for CVE-2025-64667. EPSS is 0.80%. Act only if a listed version of exchange server is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.80%
Remediation
Advisory link
Affected products
cpe microsoft/exchange server

User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe microsoft/exchange server2016

How to fix CVE-2025-64667

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-64667. EPSS is 0.80%. Act only if a listed version of exchange server is installed.

Which versions are affected?

Compare what you have installed with microsoft/exchange server 2016. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-451: User Interface (UI) Misrepresentation of Critical Information. EPSS 0.80%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 9, 2025 · NIST NVD

    Detected

    User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

  2. Oct 14, 2026 · NIST NVD

    Updated

    User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

Sources

  • CVE.orgVulnerability recordCVE-2025-64667

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-64667

    30-day exploitation probability 0.8%

    first.org
  • NIST NVDVulnerability recordCVE-2025-64667

    User interface (ui) misrepresentation of critical information in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.