CVE record · CVE-2023-36035

Microsoft Exchange Server Spoofing Vulnerability

CVSS 8.0 HighCriticalEPSS 0.87 · 99th percentile

Critical, because:

CVSS score 8.0 (7.0 or more) and EPSS 0.87 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

Published by the CVE Program (CNA: microsoft) at 14 Nov 2023, 17:57 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Microsoft	Microsoft Exchange Server 2016 Cumulative Update 23	affected 15.01.0 to before 15.01.2507.035 custom
Microsoft	Microsoft Exchange Server 2019 Cumulative Update 12	affected 15.02.0 to before 15.02.1118.040 custom
Microsoft	Microsoft Exchange Server 2019 Cumulative Update 13	affected 15.02.0 to before 15.02.1258.028 custom

Identifiers: CVE-2023-36035
CNA: microsoft
Weakness (CWE): CWE-502
Tags: Microsoft Exchange Server 2016 Cumulative Update 23
Microsoft Exchange Server 2019 Cumulative Update 12
Microsoft Exchange Server 2019 Cumulative Update 13
Insecure deserialization
Published: 14 Nov 2023
Updated: 8 Oct 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.0	High	3.1	CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	CNA (microsoft)

CISA KEV Not listed.
EPSS 0.87, the 99th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 14 Nov 2023. New records show when each source confirmed them.

Sources

References from the CNA

msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36035 vendor-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.