Authenticated network tampering
Published Aug 12, 2025 · Updated Feb 13, 2026
Improper input validation in Microsoft Exchange Server allows remote authenticated users to perform unspecified tampering over a network. Microsoft has not published the affected component, rejected input class, or validation operation that accepts the crafted data. Valid Exchange credentials and network access are required; Microsoft's published vector reports confidentiality loss rather than the integrity impact implied by the tampering description.
Summary
What happened
Improper input validation in Microsoft Exchange Server allows remote authenticated users to perform unspecified tampering over a network. Microsoft has not published the affected component, rejected input class, or validation operation that accepts the crafted data. Valid Exchange credentials and network access are required; Microsoft's published vector reports confidentiality loss rather than the integrity impact implied by the tampering description.
The record
- CVE
- CVE-2025-25005
- Published
- Aug 12, 2025
- Updated
- Feb 13, 2026
- Vendor
- Microsoft
- Product
- Microsoft Exchange Server 2019 Cumulative Update 14
- Classifications
- CWE-20, T1565
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 12, 2025CVE publishedPublication date reported by the CVE source.
- Feb 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=15.02.0.0 <15.02.1544.033
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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