CVE-2021-34470
Microsoft Exchange Server Elevation of Privilege Vulnerability
HIGH
8
CVSS Score
Published: July 14, 2021 at 05:54 PM UTC
Updated: August 10, 2026 at 04:17 PM UTC
1 product affected across 1 vendorExchange Server
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Severity
HIGH8
Exploit prediction
EPSS 4%
SSVC
PoC
Description
Microsoft Exchange Server Elevation of Privilege Vulnerability
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
15.00.0 ≤ v < 15.00.1497.02315.01.0 ≤ v < 15.01.2308.00815.02.0 ≤ v < 15.02.0922.00715.00.015.01.015.02.02013 cumulative_update_232016 cumulative_update_212019 cumulative_update_10
Affected range stops below 15.00.1497.023, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.01.2308.008, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.02.0922.007, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (3)
Third Party AdvisoryVDB Entry
Source: [email protected]
http://packetstormsecurity.com/files/163706/Microsoft-Exchange-AD-Schema-Misconfiguration-Privilege-Escalation.htmlPatchVendor Advisory
Source: [email protected]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34470Vendor AdvisoryPatch
Source: cverecord
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34470SSVC — Action Prioritization
SSVCPoCNot automatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
8HIGHmicrosoft
Vector?
Quick Info
StatusMODIFIED
CWE
NVD-CWE-noinfo
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