CVE-2026-80092ImportantEoPNetwork
Microsoft Identity Web Elevation of Privilege Vulnerability
Assessment
Authentication bypass by assumed-immutable data in Microsoft Identity Web allows an authorized attacker to elevate privileges over a network.
- Severity
- Important
- CVSS base score
- 5.3CVSS:3.1/
AV:N/ AC:H/ PR:L/ UI:N/ S:U/ C:H/ I:N/ A:N/ E:U/ RL:O/ RC:C - Impact
- Elevation of Privilege
- EPSS, next 30 days
- Not scored yet
- Public exploit code
- No Nuclei template lists it
- Exploitability
- Exploitation Less Likely
- Publicly disclosed
- No
- Customer action
- Required: apply the update
- Component
- Microsoft Identity Web
- Weakness
- CWE-302: Authentication Bypass by Assumed-Immutable Data
- Issued by
- Microsoft
- Published
- 15 Oct 2026 · October 2026
- Last revised
- 15 Oct 2026
CVSS 3.1 base metricsRed raises the risk · green lowers it
- Attack vector
- NetworkAV:N
- Attack complexity
- HighAC:H
- Privileges required
- LowPR:L
- User interaction
- NoneUI:N
- Scope
- UnchangedS:U
- Confidentiality
- HighC:H
- Integrity
- NoneI:N
- Availability
- NoneA:N
Updates that fix it
0 KBsNo KB listed
MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.
Affected products
Open Source Software1 affected product
- MessagePack 2.5.303
What changed
First observed 15 Oct 2026No field changes in the recorded history.
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