CVE-2023-21707
Microsoft Exchange Server Remote Code Execution Vulnerability
HIGH
8.8
CVSS Score
Published: February 14, 2023 at 07:32 PM UTC
Updated: August 19, 2026 at 05:18 PM UTC
1 product affected across 1 vendorExchange Server
Using Microsoft Exchange Server 2016 Cumulative Update 23 by Microsoft?
Get instant alerts when new vulnerabilities affect Microsoft Exchange Server 2016 Cumulative Update 23 - before attackers find them.
Real-time alertsTrack your software stackFree plan available
Severity
HIGH8.8
Exploit prediction
EPSS 82%
SSVC
No known exploit
Description
Microsoft Exchange Server Remote Code Execution Vulnerability
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
15.00.0 ≤ v < 15.00.1497.04815.01.0 ≤ v < 15.01.2507.02315.02.0 ≤ v < 15.02.0986.04215.02.0 ≤ v < 15.02.1118.02615.00.015.01.015.02.02013 cumulative_update_232016 cumulative_update_232019 cumulative_update_112019 cumulative_update_12
Affected range stops below 15.00.1497.048, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.01.2507.023, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.02.0986.042, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.02.1118.026, 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:
Patch and advisory references
References (1)
Vendor AdvisoryPatch
Source: [email protected]
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21707SSVC — Action Prioritization
SSVCNo known exploitNot automatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
8.8HIGHmicrosoft
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-502NVD-CWE-noinfo
Get alerted
Stop reading CVE feeds looking for your own stack
Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.
Free plan, no card