CVE-2023-21745
Microsoft Exchange Server Spoofing Vulnerability
HIGH
8
CVSS Score
Published: January 10, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 05:33 AM UTC
1 product affected across 1 vendorExchange Server
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Severity
HIGH8
Exploit prediction
EPSS 2%
SSVC
No known exploit
Description
Microsoft Exchange Server Spoofing Vulnerability
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
15.01.0 ≤ v < 15.01.2507.01715.02.0 ≤ v < 15.02.0986.03715.02.0 ≤ v < 15.02.1118.02115.01.015.02.02016 cumulative_update_232019 cumulative_update_112019 cumulative_update_12
Affected range stops below 15.01.2507.017, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.02.0986.037, so it looks safe — our inference, not a vendor statement
Affected range stops below 15.02.1118.021, 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 Advisory
Source: [email protected]
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21745SSVC — Action Prioritization
SSVCNo known exploitNot automatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
8HIGHmicrosoft
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-502NVD-CWE-noinfo
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