CVE-2021-26855
9.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:F/RL:O/RC:C
Summary
Microsoft Exchange Server Remote Code Execution Vulnerability
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 19 | 15.01.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 8 | 15.02.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2019 | 15.02.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2013 Cumulative Update 22 | 15.00.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 2 | 15.02.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 13 | 15.01.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2013 Cumulative Update 23 | 15.00.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 3 | 15.02.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 14 | 15.01.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 4 | 15.02.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 15 | 15.01.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 5 | 15.02.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 6 | 15.02.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 16 | 15.01.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 17 | 15.01.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 7 | 15.02.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 18 | 15.01.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2013 Cumulative Update 21 | 15.00.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 12 | 15.01.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 8 | 15.01.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 1 | 15.02.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 9 | 15.01.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 10 | 15.01.0 < publication | affected |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 11 | 15.01.0 < publication | affected |
Weaknesses
- Remote Code Execution
ADP Enrichment
CVE Program Container
Additional References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26855
- http://packetstormsecurity.com/files/161846/Microsoft-Exchange-2019-SSRF-Arbitrary-File-Write.html
- http://packetstormsecurity.com/files/161938/Microsoft-Exchange-ProxyLogon-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/162610/Microsoft-Exchange-2019-Unauthenticated-Email-Download.html
- http://packetstormsecurity.com/files/162736/Microsoft-Exchange-ProxyLogon-Collector.html
CISA ADP Vulnrichment
- SSVC:
- Exploitation: active
- Automatable: yes
- Technical Impact: total
Additional References
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26855
- http://packetstormsecurity.com/files/161846/Microsoft-Exchange-2019-SSRF-Arbitrary-File-Write.html
- http://packetstormsecurity.com/files/161938/Microsoft-Exchange-ProxyLogon-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/162610/Microsoft-Exchange-2019-Unauthenticated-Email-Download.html
- http://packetstormsecurity.com/files/162736/Microsoft-Exchange-ProxyLogon-Collector.html
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