CVE-2021-26858

Microsoft Exchange Server Remote Code Execution Vulnerability
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.8 HIGH
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 99.84%
Affected Products (NVD)
VendorProductVersion
microsoftexchange_server
15.0.0.0 ≤
𝑥
< 15.0.1473.6
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.397.11
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.1779.8
microsoftexchange_server
15.0.0.0 ≤
𝑥
< 15.0.1497.12
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.464.15
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.1847.12
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.659.12
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.1913.12
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.595.8
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.529.13
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.1979.8
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.2044.13
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.721.13
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.2106.13
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.2176.9
microsoftexchange_server
15.2.0.0 ≤
𝑥
< 15.2.792.10
microsoftexchange_server
15.0.0.0 ≤
𝑥
< 15.0.1395.12
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.1713.10
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.1415.10
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.1979.6
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.1466.16
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.1531.12
microsoftexchange_server
15.1.0.0 ≤
𝑥
< 15.1.1591.18
𝑥
= Vulnerable software versions
References
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26858
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26858
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26858