Vulnerability in Microsoft Exchange Server 2016 Cumulative Update 18
CVE-2021-1730
<p>A spoofing vulnerability exists in Microsoft Exchange Server which could result in an attack that would allow a malicious actor to impersonate the user.</p> <p>This update addresses this vulnerability.</p> <p>To prevent these types of a…
EPSS: 0.016 (81.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C.
Affected products
- Microsoft Exchange Server 2016 Cumulative Update 18 — versions 15.01.0
- Microsoft Exchange Server 2019 Cumulative Update 7 — versions 15.02.0
Public proof-of-concept exploits
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1730 (x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-1730?
- CVE-2021-1730 is a medium-severity vulnerability in Microsoft Exchange Server 2016 Cumulative Update 18. CVSS score: 5.4/10. Published 2021-02-25.
- How severe is CVE-2021-1730?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2021-1730 known to be exploited?
- 13 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.