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Medium severity · published Sep 16, 2026
CVE-2026-76447
Cisco Identity Services Engine Certificate Reload Vulnerability
5.3
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CI
Cisco ISE Passive Identity Connector · Cisco
3.2.0; 3.1.0; 3.3.0; 3.4.0; 3.5.0 · source: vendor
CI
Cisco Identity Services Engine Software · Cisco
3.1.0; 3.1.0 p1; 3.1.0 p3; 3.1.0 p2; 3.2.0; 3.1.0 p4; +34 more · source: vendor
IS
Identity Services Engine · Cisco
before 3.3.0; 3.3.0; 3.3.0; 3.3.0; 3.3.0; 3.3.0; +17 more · source: NVD
IS
Identity Services Engine Passive Identity Connector · Cisco
before 3.3.0; 3.3.0; 3.3.0; 3.3.0; 3.3.0; 3.3.0; +13 more · source: NVD
Affected product
CI
Cisco Identity Services Engine Software
Cisco
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-76447
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-76447
Vendor Advisory
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multiauth-bypass-sgD2HbL4
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