Cisco Identity Services Engine Certificate Reload Vulnerability

Summary

CVE	CVE-2026-76447
State	PUBLISHED
Assigner	cisco
Source Priority	CVE Program / NVD first with legacy fallback
Published	2026-09-16 21:17:20 UTC
Updated	2026-09-28 13:09:41 UTC
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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS: 0.003760000 probability, percentile 0.289620000 (date 2026-09-29)

Problem Types: CWE-306 | CWE-306 Missing Authentication for Critical Function

Version	Source	Type	Score	Severity	Vector
3.1	[email protected]	Secondary	5.3	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`
3.1	CNA	CVSSV3_1	5.3	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`

CVSS v3.1 Breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

NVD Known Affected Configurations (CPE 2.3)

Type	Vendor	Product	Version	Update	Edition	Language
Application	Cisco	Identity Services Engine	All	All	All	All
Application	Cisco	Identity Services Engine	3.3.0	patch1	All	All
Application	Cisco	Identity Services Engine	3.3.0	patch10	All	All
Application	Cisco	Identity Services Engine	3.3.0	patch11	All	All
Application	Cisco	Identity Services Engine	3.3.0	patch2	All	All
Application	Cisco	Identity Services Engine	3.3.0	patch3	All	All
Application	Cisco	Identity Services Engine	3.3.0	patch4	All	All
Application	Cisco	Identity Services Engine	3.3.0	patch5	All	All
Application	Cisco	Identity Services Engine	3.3.0	patch6	All	All
Application	Cisco	Identity Services Engine	3.3.0	patch7	All	All
Application	Cisco	Identity Services Engine	3.3.0	patch8	All	All
Application	Cisco	Identity Services Engine	3.3.0	patch9	All	All
Application	Cisco	Identity Services Engine	3.4.0	-	All	All
Application	Cisco	Identity Services Engine	3.4.0	patch1	All	All
Application	Cisco	Identity Services Engine	3.4.0	patch2	All	All
Application	Cisco	Identity Services Engine	3.4.0	patch3	All	All
Application	Cisco	Identity Services Engine	3.4.0	patch4	All	All
Application	Cisco	Identity Services Engine	3.4.0	patch5	All	All
Application	Cisco	Identity Services Engine	3.4.0	patch6	All	All
Application	Cisco	Identity Services Engine	3.5.0	-	All	All
Application	Cisco	Identity Services Engine	3.5.0	patch1	All	All
Application	Cisco	Identity Services Engine	3.5.0	patch2	All	All
Application	Cisco	Identity Services Engine	3.5.0	patch3	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	All	All	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.3.0	patch1	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.3.0	patch10	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.3.0	patch11	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.3.0	patch2	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.3.0	patch3	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.3.0	patch4	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.3.0	patch5	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.3.0	patch6	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.3.0	patch7	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.3.0	patch8	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.3.0	patch9	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.4.0	-	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.4.0	patch1	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.4.0	patch2	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.4.0	patch3	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.4.0	patch4	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.4.0	patch5	All	All
Application	Cisco	Identity Services Engine Passive Identity Connector	3.4.0	patch6	All	All

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.1.0	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.1.0 p1	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.1.0 p3	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.1.0 p2	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.2.0	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.1.0 p4	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.1.0 p5	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.2.0 p1	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.1.0 p6	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.2.0 p2	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.1.0 p7	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.3.0	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.2.0 p3	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.2.0 p4	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.1.0 p8	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.2.0 p5	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.2.0 p6	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.1.0 p9	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.3 Patch 2	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.3 Patch 1	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.3 Patch 3	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.4.0	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.2.0 p7	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.3 Patch 4	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.4 Patch 1	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.1.0 p10	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.3 Patch 5	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.3 Patch 6	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.4 Patch 2	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.3 Patch 7	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.4 Patch 3	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.5.0	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.4 Patch 4	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.3 Patch 8	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.2 Patch 8	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.5 Patch 1	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.3 Patch 9	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.2 Patch 9	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.4 Patch 5	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.5 Patch 3	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.5 Patch 2	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.3 Patch 10	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.3 Patch 11	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.4 Patch 6	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.2 Patch 10	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.1.0 p72	Not specified
CNA	Cisco	Cisco Identity Services Engine Software	affected 3.1.0 p11	Not specified
CNA	Cisco	Cisco ISE Passive Identity Connector	affected 3.2.0	Not specified
CNA	Cisco	Cisco ISE Passive Identity Connector	affected 3.1.0	Not specified
CNA	Cisco	Cisco ISE Passive Identity Connector	affected 3.3.0	Not specified
CNA	Cisco	Cisco ISE Passive Identity Connector	affected 3.4.0	Not specified
CNA	Cisco	Cisco ISE Passive Identity Connector	affected 3.5.0	Not specified

References

Reference	Source	Link	Tags
sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-mu...	[email protected]	sec.cloudapps.cisco.com	Vendor Advisory
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

No vendor comments have been submitted for this CVE.

Additional Advisory Data

Exploits

CNA: The Cisco PSIRT is aware that a public announcement is available for the vulnerabilities that are described in this advisory. The Cisco PSIRT is not aware of any malicious use of the vulnerabilities that are described in this advisory.

There are currently no legacy QID mappings associated with this CVE.