Deserialization in Microsoft Exchange Server
CVE-2026-62912
Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to deny service over a network.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.020 (79.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.020 · change: +0.007
Affected products
- Microsoft Exchange Server — versions 2016, 2019
- Microsoft Exchange Server Subscription Edition
- 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 Denial of Service Vulnerability (vendor-advisory, Patch, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-62912?
- CVE-2026-62912 is a medium-severity vulnerability in Microsoft Exchange Server, classified under Deserialization of Untrusted Data. CVSS score: 6.5/10. Published 2026-08-11.
- How severe is CVE-2026-62912?
- Medium severity. CVSS v3 base score is 6.5 out of 10.