CVE-2025-64666 (GCVE-0-2025-64666)

Vulnerability from cvelistv5 – Published: 2025-12-09 17:55 – Updated: 2026-04-16 14:18
VLAI?
Title
Microsoft Exchange Server Elevation of Privilege Vulnerability
Summary
Improper input validation in Microsoft Exchange Server allows an authorized attacker to elevate privileges over a network.
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CWE
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
Microsoft Microsoft Exchange Server 2016 Cumulative Update 23 Affected: 15.01.0.0 , < 15.01.2507.063 (custom)
Create a notification for this product.
Date Public ?
2025-12-09 08:00
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.