Service interruption via unthrottled resource allocation
Published Sep 8, 2026 · Updated Sep 9, 2026
Resource exhaustion in AD FS on affected Windows releases allows remote attackers to interrupt federation service over a network. Microsoft identifies unbounded or unthrottled resource allocation as the fault but has not disclosed the request path or resource consumed. Exploitation requires no authentication or user interaction, has high complexity, and is limited to service interruption without reported data exposure or modification.
Summary
What happened
Resource exhaustion in AD FS on affected Windows releases allows remote attackers to interrupt federation service over a network. Microsoft identifies unbounded or unthrottled resource allocation as the fault but has not disclosed the request path or resource consumed. Exploitation requires no authentication or user interaction, has high complexity, and is limited to service interruption without reported data exposure or modification.
The record
- CVE
- CVE-2026-72978
- Published
- Sep 8, 2026
- Updated
- Sep 9, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-770, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.17763.0 <10.0.17763.9245
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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