Vulnerability Monitor

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CVE-2021-31207

Microsoft Exchange Server Security Feature Bypass Vulnerability

Published

2021-05-11T19:15:10.397

Last Modified

2025-03-13T16:41:49.303

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 6.6 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:S/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: SINGLE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

8.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-434
Type: Secondary
CWE-434

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	microsoft	exchange_server	2013	Yes
Application	microsoft	exchange_server	2016	Yes
Application	microsoft	exchange_server	2016	Yes
Application	microsoft	exchange_server	2019	Yes
Application	microsoft	exchange_server	2019	Yes

References

http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry ([email protected])
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31207 Patch, Vendor Advisory ([email protected])
https://www.zerodayinitiative.com/advisories/ZDI-21-819/ Third Party Advisory, VDB Entry ([email protected])
http://packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.html Exploit, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31207 Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.zerodayinitiative.com/advisories/ZDI-21-819/ Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)