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Vulnerabilities

Security research · CVE-2025-53786

On April 18th 2025, Microsoft announced Exchange Server Security Changes for Hybrid Deployments and accompanying non-security Hot Fix.

Published Aug 6, 2025 · catalog updated Feb 26, 2026 · Microsoft Microsoft Exchange Server Subscription Edition RTM

Check if you run it

No confirmed exploitation is on record for CVE-2025-53786. EPSS is 7.71%. Act only if a listed version of Microsoft Microsoft Exchange Server Subscription Edition RTM is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
7.71%
Remediation
Version ranges on file
Affected products
vendor Microsoft Microsoft Exchange Server Subscription Edition RTM 15.02.0.0 <15.02.2562.017

On April 18th 2025, Microsoft announced Exchange Server Security Changes for Hybrid Deployments and accompanying non-security Hot Fix. Microsoft made these changes in the general interest of improving the security of hybrid Exchange deployments. Following further investigation, Microsoft identified specific security implications tied to the guidance and configuration steps outlined in the April announcement. Microsoft is issuing CVE-2025-53786 to document a vulnerability that is addressed by taking the steps documented with the April 18th announcement. Microsoft strongly recommends reading the

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.

  • vendor Microsoft Microsoft Exchange Server Subscription Edition RTM 15.02.0.0 <15.02.2562.01715.02.0.0 <15.02.2562.017

How to fix CVE-2025-53786

  • Recommended remediation

    Affected version ranges suggest a fixed boundary. Verify against the vendor advisory for your release.

  • Official advisories

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-2025-53786. EPSS is 7.71%. Act only if a listed version of Microsoft Microsoft Exchange Server Subscription Edition RTM is installed.

Which versions are affected?

Compare what you have installed with Microsoft Microsoft Exchange Server Subscription Edition RTM 15.02.0.0 <15.02.2562.017 15.02.0.0 <15.02.2562.017. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 7.71%. 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. Aug 6, 2025 · EUVD

    Detected

    On April 18th 2025, Microsoft announced Exchange Server Security Changes for Hybrid Deployments and accompanying non-security Hot Fix. Microsoft made these changes in the general interest of improving the security of hybrid Exchange deployments. Following further investigation, Microsoft identified specific security implications tied to the guidance and configuration steps outlined in the April an

  2. Feb 26, 2026 · EUVD

    Updated

    On April 18th 2025, Microsoft announced Exchange Server Security Changes for Hybrid Deployments and accompanying non-security Hot Fix. Microsoft made these changes in the general interest of improving the security of hybrid Exchange deployments. Following further investigation, Microsoft identified specific security implications tied to the guidance and configuration steps outlined in the April an

Sources

  • EUVDVulnerability recordEUVD-2025-23857

    On April 18th 2025, Microsoft announced Exchange Server Security Changes for Hybrid Deployments and accompanying non-security Hot Fix. Microsoft made these changes in the general interest of improving the security of hybrid Exchange deployments. Following further investigation, M

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Feb 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.