CVE-2025-53782 json
Microsoft Exchange Server Elevation of Privilege Vulnerability
published 2025-10-14 12 mo ago modified 2026-10-18 21 d ago also EUVD-2025-34428
- cvss
- 8.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 30%
- public exploits
- 0
- none known
Summary
Incorrect implementation of authentication algorithm in Microsoft Exchange Server allows an unauthorized attacker to elevate privileges locally.
Patch / fix
- Microsoft Microsoft Exchange Server 2016 Cumulative Update 23 15.01.2507.061
- Microsoft Microsoft Exchange Server 2019 Cumulative Update 14 15.02.1544.036
- Microsoft Microsoft Exchange Server 2019 Cumulative Update 15 15.02.1748.039
- Microsoft Microsoft Exchange Server Subscription Edition RTM 15.02.2562.029
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 12 mo ago
Exploit prediction
0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| CNA | 3.1 | 8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Microsoft Microsoft Exchange Server 2016 Cumulative Update 23
- Microsoft Microsoft Exchange Server 2019 Cumulative Update 14
- Microsoft Microsoft Exchange Server 2019 Cumulative Update 15
- Microsoft Microsoft Exchange Server Subscription Edition RTM
Classification
- Weakness
-
- CWE-303 Incorrect Implementation of Authentication Algorithm
- Technology feeds
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2025-53782
vendor-advisory, patch
Sources
- CVE List CVE-2025-53782
- NVD CVE-2025-53782
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