Vulnerability · Published Jul 14, 2021 · Assigned by microsoft
CVE-2021-34470Microsoft Exchange Server Elevation of Privilege Vulnerability
High 8.0
In plain English
A high-severity security flaw in Microsoft Exchange Server 2013 Cumulative Update 23 from Microsoft. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 4.4% (higher than 91% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS 3.1)8.0High
Exploit odds (30 days)4.4%top 8.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack tooling1Public PoC
Official description
Microsoft Exchange Server Elevation of Privilege Vulnerability
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Exchange Server 2013 Cumulative Update 23 | 15.00.0 – before 15.00.1497.023 |
| Microsoft | Microsoft Exchange Server 2016 Cumulative Update 21 | 15.01.0 – before 15.01.2308.008 |
| Microsoft | Microsoft Exchange Server 2019 Cumulative Update 10 | 15.02.0 – before 15.02.0922.007 |
References
- Microsoft Exchange Server Elevation of Privilege Vulnerability vendor-advisory, patch
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34470 x_refsource_MISC, x_transferred
- http://packetstormsecurity.com/files/163706/Microsoft-Exchange-AD-Schema-Misconfiguration-Privilege-Escalation.html x_refsource_MISC, x_transferred