← All advisories

Critical severity9.0CISA KEVNVD Advisory· Published Jul 14, 2021· Updated Aug 10, 2026

CVE-2021-34523

CVE-2021-34523

Description

Microsoft Exchange Server Elevation of Privilege Vulnerability

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

6

Microsoft/Exchange Server6 versions
cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*+ 5 more
- cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*
- cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_19:*:*:*:*:*:*
- cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_20:*:*:*:*:*:*
- cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_8:*:*:*:*:*:*
- cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_9:*:*:*:*:*:*
- (no CPE)

Patches

Vulnerability mechanics

References

5

msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34523nvdPatchVendor Advisory
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34523nvdPatchVendor Advisory
packetstormsecurity.com/files/163895/Microsoft-Exchange-ProxyShell-Remote-Code-Execution.htmlnvdExploitThird Party AdvisoryVDB Entry
www.zerodayinitiative.com/advisories/ZDI-21-822/nvdThird Party AdvisoryVDB Entry
www.cisa.gov/known-exploited-vulnerabilities-catalognvdUS Government Resource

News mentions

0

No linked articles in our index yet.