Vulnerability in Microsoft Exchange Server 2016 Cumulative Update 20
CVE-2021-33768
Microsoft Exchange Server Elevation of Privilege Vulnerability
EPSS: 0.002 (47.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C.
Affected products
- Microsoft Exchange Server 2016 Cumulative Update 20 — versions 15.01.0
- Microsoft Exchange Server 2016 Cumulative Update 21 — versions 15.01.0
- Microsoft Exchange Server 2019 Cumulative Update 10 — versions 15.02.0
- Microsoft Exchange Server 2019 Cumulative Update 9 — versions 15.02.0
Public proof-of-concept exploits
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33768 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-33768?
- CVE-2021-33768 is a high-severity vulnerability in Microsoft Exchange Server 2016 Cumulative Update 20. CVSS score: 8.0/10. Published 2021-07-14.
- How severe is CVE-2021-33768?
- High severity. CVSS v3 base score is 8.0 out of 10.
- Is CVE-2021-33768 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.