Information disclosure in Microsoft Exchange Server 2016 Cumulative Update 23
CVE-2025-33051
Exposure of sensitive information to an unauthorized actor in Microsoft Exchange Server allows an unauthorized attacker to disclose information over a network.
Vulnerability class: Information Disclosure
EPSS: 0.021 (84.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C.
Affected products
- Microsoft Exchange Server 2016 Cumulative Update 23 — versions 15.01.0.0
- Microsoft Exchange Server 2019 Cumulative Update 14 — versions 15.02.0.0
- Microsoft Exchange Server 2019 Cumulative Update 15 — versions 15.02.0.0
- Microsoft Exchange Server Subscription Edition Rtm — versions 15.02.0.0
Weakness classification (CWE)
References
- Microsoft Exchange Server Information Disclosure Vulnerability (vendor-advisory, patch)
Frequently asked questions
- What is CVE-2025-33051?
- CVE-2025-33051 is a high-severity vulnerability in Microsoft Exchange Server 2016 Cumulative Update 23, classified under Information Disclosure. CVSS score: 7.5/10. Published 2025-08-12.
- How severe is CVE-2025-33051?
- High severity. CVSS v3 base score is 7.5 out of 10.