CVE-2026-76447: Missing Authentication for Critical Function in Cisco Cisco Identity Services Engine Software
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.
AI Analysis
Technical Summary
This vulnerability affects the OCSP responder component of Cisco Identity Services Engine (ISE) and Cisco ISE-PIC software. Due to missing authentication on a function, an unauthenticated remote attacker can send a crafted request to cause the OCSP responder to reload its certificate and key material on demand. The flaw does not allow compromise of confidentiality or integrity but results in an availability impact by forcing administrative reloads. The affected versions explicitly include 3.1.0, 3.2.0, 3.3.0, 3.4.0, and 3.5.0.
Potential Impact
An attacker can cause an availability disruption by forcing the OCSP responder to reload certificate and key material without authentication. There is no impact on confidentiality or integrity. This could lead to temporary service interruption or denial of OCSP functionality until the reload completes.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch or official fix is available, monitor for unusual OCSP responder reload activity and restrict network access to the OCSP responder where feasible.
CVE-2026-76447: Missing Authentication for Critical Function in Cisco Cisco Identity Services Engine Software
Description
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.
CVSS v3.1
Score 5.3medium
Affected software
Cisco
Cisco Identity Services Engine Software
Cisco
Cisco ISE Passive Identity Connector
pkg:github/cisco/identity-services-engine-softwareRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects the OCSP responder component of Cisco Identity Services Engine (ISE) and Cisco ISE-PIC software. Due to missing authentication on a function, an unauthenticated remote attacker can send a crafted request to cause the OCSP responder to reload its certificate and key material on demand. The flaw does not allow compromise of confidentiality or integrity but results in an availability impact by forcing administrative reloads. The affected versions explicitly include 3.1.0, 3.2.0, 3.3.0, 3.4.0, and 3.5.0.
Potential Impact
An attacker can cause an availability disruption by forcing the OCSP responder to reload certificate and key material without authentication. There is no impact on confidentiality or integrity. This could lead to temporary service interruption or denial of OCSP functionality until the reload completes.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch or official fix is available, monitor for unusual OCSP responder reload activity and restrict network access to the OCSP responder where feasible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisco
- Date Reserved
- 2026-08-19T12:02:03.636Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aab005e55bf5e2cf5231dec
Added to database: 09/16/2026, 20:47:26 UTC
Last enriched: 09/16/2026, 22:02:09 UTC
Last updated: 09/17/2026, 02:01:22 UTC
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.