RCE in Microsoft Exchange Server
CVE-2021-31198
Microsoft Exchange Server Remote Code Execution Vulnerability
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.049 (91.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.049 · newest: 0.049 · change: 0.000
Affected products
- Microsoft Exchange Server — versions 2013, 2016, 2019
- Microsoft Exchange Server 2013 Cumulative Update 23 — versions 15.00.0
- Microsoft Exchange Server 2016 Cumulative Update 19 — versions 15.01.0
- Microsoft Exchange Server 2016 Cumulative Update 20 — versions 15.01.0
- Microsoft Exchange Server 2019 Cumulative Update 8 — versions 15.02.0
- Microsoft Exchange Server 2019 Cumulative Update 9 — versions 15.02.0
Weakness classification (CWE)
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31198 (Patch, Vendor Advisory)
- www.zerodayinitiative.com/advisories/ZDI-21-894/ (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-31198?
- CVE-2021-31198 is a high-severity vulnerability in Microsoft Exchange Server, classified under Improper Input Validation. CVSS score: 7.8/10. Published 2021-05-11.
- How severe is CVE-2021-31198?
- High severity. CVSS v3 base score is 7.8 out of 10.