Recorded 14 Oct 2026 at 11:22 UTC. This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position. See the latest record.
Microsoft Exchange Server Elevation of Privilege Vulnerability
Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.
What it said
- CVE
- CVE-2026-87692
- Severity
- Important
- CVSS base score
- 7.8
- CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
- Impact
- Elevation of Privilege
- Exploitation detected
- Not reported by MSRC
- Publicly disclosed
- No
- Exploitability
- Exploitation Less Likely
- Component
- Microsoft Exchange Server
- Weakness
- CWE-502: Deserialization of Untrusted Data
- Issued by
- Microsoft
- Customer action
- Required: apply the update
- Affected products
- Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server Subscription Edition RTM
- Updates that fix it
- KB5128895: Microsoft Exchange Server Subscription Edition RTM; KB5128897: Microsoft Exchange Server 2019 Cumulative Update 14; KB5128898: Microsoft Exchange Server 2016 Cumulative Update 23
- CISA KEV
- Not listed in the collected catalog
- EPSS
- Not scored
- Public exploit code
- No Nuclei template listed
- Published
- 13 Oct 2026 07:00 UTC
- Last revised
- 13 Oct 2026 07:00 UTC
- Revision note
- Information published.
Recorded links
Source evidence when recorded
- Microsoft security releases
- Complete at observationRead 14 Oct 2026 at 11:21 UTC
- CISA KEV
- Complete at observationRead 14 Oct 2026 at 11:21 UTC
- FIRST EPSS
- Complete at observationRead 14 Oct 2026 at 11:21 UTC
- Public exploit code
- Complete at observationRead 14 Oct 2026 at 11:21 UTC
Coverage describes the sources at this observation. A complete read then does not establish their current position.
What changed
First observed 14 Oct 2026No field changes in the recorded history.
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