EUVD-2026-81165
GHSA-vwx3-phv6-wmxp
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Unauthenticated network-reachable OCSP function (AV:N/AC:L/PR:N/UI:N) with no confidentiality/integrity impact; forced certificate/key reload yields only limited availability disruption (A:L, S:U).
Primary rating from Vendor (cisco).
CVSS VectorNVD
Lifecycle Timeline
2DescriptionNVD
A vulnerability in the Online Certificate Status Protocol (OCSP) responder of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to cause an administrative reload of the OCSP responder certificate and key material.
This vulnerability is due to missing authentication on a function of the OCSP responder. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to cause the OCSP responder to reload certificate and key material on demand.
AnalysisAI
Missing authentication on a function of the Online Certificate Status Protocol (OCSP) responder in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) lets an unauthenticated, remote attacker trigger an on-demand reload of the responder's certificate and key material. Affected deployments span essentially the current ISE 3.1 through 3.5 release trains and the corresponding ISE-PIC builds, with any host reachable to the OCSP responder service in scope. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires network reachability to the OCSP (Online Certificate Status Protocol) responder service of an affected Cisco ISE or ISE-PIC deployment; the vulnerable function of the OCSP responder lacks authentication (CWE-306), so no credentials, user interaction, or non-default configuration is stated as required (PR:N/UI:N/AC:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine but low-to-moderate priority issue whose real-world risk is capped by its narrow impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The provided intelligence does not specify an exact fixed software version, so no patch version should be assumed; the Cisco advisory at https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multiauth-bypass-sgD2HbL4 is the authoritative source for the minimum fixed release per ISE and ISE-PIC train, and administrators should apply the corresponding Cisco-provided patch or upgrade and verify the OCSP responder service after the change. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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