CVE-2021-34523

Microsoft Exchange Server Elevation of Privilege Vulnerability
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9 CRITICAL
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 99.98%
Affected Products (NVD)
VendorProductVersion
microsoftexchange_server
15.0.0.0 ≤
𝑥
< 15.0.1497.15
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.858.10
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.2242.8
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.2176.12
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.792.13
𝑥
= Vulnerable software versions
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34523
http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.html
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34523
https://www.zerodayinitiative.com/advisories/ZDI-21-822/
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-34523