5.3

CVE-2026-76447: cisco cisco identity services engine software

CVSS: 5.3v3.1MediumAnalyzed
Published 16-09-2026Last modified 17-09-2026
Open JSON

Vulnerability summary

CVE-2026-76447 is a medium (CVSS 5.3) vulnerability in cisco cisco identity services engine software. EPSS estimates a 0.38% chance of exploitation in the next 30 days, higher than 30% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.38%
0%100%
Low · +0.10 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 16-09-2026
    PublishedVulnerability first disclosed.
  2. 17-09-2026
    Last modifiedVulnerability information updated.

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 metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.38%

Chance of exploitation in the next 30 days

Percentile

30%

Versus all other CVEs

30-day change

+0.10 pp

From 0.28% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.38%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cisco4 products
  • cisco identity services engine software3.1.0 | 3.1.0 p1 | 3.1.0 p3 | 3.1.0 p2 | 3.2.0 | 3.1.0 p4 | 3.1.0 p5 | 3.2.0 p1 | 3.1.0 p6 | 3.2.0 p2 | 3.1.0 p7 | 3.3.0 | 3.2.0 p3 | 3.2.0 p4 | 3.1.0 p8 | 3.2.0 p5 | 3.2.0 p6 | 3.1.0 p9 | 3.3 Patch 2 | 3.3 Patch 1 | 3.3 Patch 3 | 3.4.0 | 3.2.0 p7 | 3.3 Patch 4 | 3.4 Patch 1 | 3.1.0 p10 | 3.3 Patch 5 | 3.3 Patch 6 | 3.4 Patch 2 | 3.3 Patch 7 | 3.4 Patch 3 | 3.5.0 | 3.4 Patch 4 | 3.3 Patch 8 | 3.2 Patch 8 | 3.5 Patch 1 | 3.3 Patch 9 | 3.2 Patch 9 | 3.4 Patch 5 | 3.5 Patch 3 | 3.5 Patch 2 | 3.3 Patch 10 | 3.3 Patch 11 | 3.4 Patch 6 | 3.2 Patch 10 | 3.1.0 p72 | 3.1.0 p11
  • cisco ise passive identity connector3.2.0 | 3.1.0 | 3.3.0 | 3.4.0 | 3.5.0
  • identity_services_engine< 3.3.0 | 3.3.0:patch1 | 3.3.0:patch10 | 3.3.0:patch11 | 3.3.0:patch2 | 3.3.0:patch3 | 3.3.0:patch4 | 3.3.0:patch5 | 3.3.0:patch6 | 3.3.0:patch7 | 3.3.0:patch8 | 3.3.0:patch9 | 3.4.0 | 3.4.0:patch1 | 3.4.0:patch2 | 3.4.0:patch3 | 3.4.0:patch4 | 3.4.0:patch5 | 3.4.0:patch6 | 3.5.0 | 3.5.0:patch1 | 3.5.0:patch2 | 3.5.0:patch3
  • identity_services_engine_passive_identity_connector< 3.3.0 | 3.3.0:patch1 | 3.3.0:patch10 | 3.3.0:patch11 | 3.3.0:patch2 | 3.3.0:patch3 | 3.3.0:patch4 | 3.3.0:patch5 | 3.3.0:patch6 | 3.3.0:patch7 | 3.3.0:patch8 | 3.3.0:patch9 | 3.4.0 | 3.4.0:patch1 | 3.4.0:patch2 | 3.4.0:patch3 | 3.4.0:patch4 | 3.4.0:patch5 | 3.4.0:patch6

1 vendor · 4 products

References

1 links