CVE-2026-83645
Status: Awaiting AnalysisHigh (7.5)—
Severity7.5High · CVSS 3.1
Exploitation probability1.10 %higher than 65% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found
Allocation of resources without limits or throttling in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.
CVSS
- Base score
- 7.5
- Version
- 3.1
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days
- 1.10 %
- Percentile among all scored CVEs
- 65
- Score date
- 10/21/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
ATT&CK techniques
How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.
- Exploitation
T1190Exploit Public-Facing Applicationinitial access85 % - Primary impact
T1499Endpoint Denial of Serviceimpact90 %
Vector AV:N/PR:N/UI:N con A:H y CWE-770 (recursos sin límite) permite DoS por red sin privilegios; la explotación es T1190 según la regla de red sin privilegios.
Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.
ATT&CK mitigations that cover these techniques
Affected technologies (1)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
CWEs
- CWE-770
References
Show 1 references
Raw JSON (NVD)
Show
{
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"published": "2026-10-13T19:20:05.500",
"references": [
{
"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83645",
"source": "secure@microsoft.com"
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"lastModified": "2026-10-13T21:18:30.667",
"sourceIdentifier": "secure@microsoft.com"
}