CISA KEV Critical

CVE-2026-76460 — Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability

A vulnerability in an API of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to bypass authentication. This vulnerability is due to insufficient authentication control on an API endpoint. An attacker could exploit this vulnerability by sending a crafted request to an affected API endpoint. A successful exploit could allow the attacker to gain unauthorized access to the affected device by bypassing the web-based management interface.

Published Sep 16, 2026 · Updated Oct 13, 2026 · Sources: CISA Known Exploited Vulnerabilities, NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: cisco

High

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

CISA KEV · Sep 16, 2026 Proofs of concept on GitHub · 1

How the score was calculated

Confirmed exploitation (CISA KEV)+35
Public exploit/PoC (github)+6
EPSS 14% (30-day exploitation probability)+14
Technical severity (critical)+10
Automatable exploitation (SSVC)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Confirmed

CISA KEV, listed Sep 16, 2026

EPSS FIRST

14.03%

ahead of 97% of scored CVEs · Oct 14, 2026

Affects

Cisco

Cisco Identity Services Engine Software and 3 more

CVSS base

10.0

Critical · 3 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

Active

none · proof-of-concept · active

Automatable

Yes

can an attacker script the kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

Documented mitigation — sec.cloudapps.cisco.com (NIST National Vulnerability Database)

CISA required action CISA

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

US federal deadline: Sep 19, 2026 — passed 26 day(s) ago

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Cisco Cisco Identity Services Engine Software, Cisco Cisco ISE Passive Identity Connector, Cisco Identity Services Engine…).
Treat as emergency remediation: the CVE is in CISA KEV (confirmed exploitation).
The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
Apply the documented mitigations until a definitive fix is available.
EPSS ahead of 97% of scored CVEs: prioritize it in the patch queue.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Cisco	Cisco Identity Services Engine Software	version 3.4 Patch 6version 3.2 Patch 10version 3.1.0 p11version 3.1.0 p8version 3.1.0 p9version 3.3 Patch 2version 3.3 Patch 1version 3.3 Patch 3 and 22 more version 3.4.0version 3.2.0 p7version 3.3 Patch 4version 3.4 Patch 1version 3.1.0 p10version 3.3 Patch 5version 3.3 Patch 6version 3.4 Patch 2version 3.3 Patch 7version 3.4 Patch 3version 3.5.0version 3.4 Patch 4version 3.3 Patch 8version 3.2 Patch 8version 3.5 Patch 1version 3.3 Patch 9version 3.2 Patch 9version 3.4 Patch 5version 3.5 Patch 3version 3.5 Patch 2version 3.3 Patch 10version 3.3 Patch 11	Vulnerable	CVE Program (cve.org) e CISA ADP
Cisco	Cisco ISE Passive Identity Connector	version 3.4.0version 3.5.0	Vulnerable	CVE Program (cve.org) e CISA ADP
Cisco	Identity Services Engine	version 3.1.0version 3.1.0-patch1version 3.1.0-patch10version 3.1.0-patch11version 3.1.0-patch2version 3.1.0-patch3version 3.1.0-patch4version 3.1.0-patch5 and 38 more version 3.1.0-patch6version 3.1.0-patch7version 3.1.0-patch8version 3.1.0-patch9version 3.2.0version 3.2.0-patch1version 3.2.0-patch10version 3.2.0-patch2version 3.2.0-patch3version 3.2.0-patch4version 3.2.0-patch5version 3.2.0-patch6version 3.2.0-patch7version 3.2.0-patch8version 3.2.0-patch9version 3.3.0version 3.3.0-patch1version 3.3.0-patch10version 3.3.0-patch11version 3.3.0-patch2version 3.3.0-patch3version 3.3.0-patch4version 3.3.0-patch5version 3.3.0-patch6version 3.3.0-patch7version 3.3.0-patch8version 3.3.0-patch9version 3.4.0version 3.4.0-patch1version 3.4.0-patch2version 3.4.0-patch3version 3.4.0-patch4version 3.4.0-patch5version 3.4.0-patch6version 3.5.0version 3.5.0-patch1version 3.5.0-patch2version 3.5.0-patch3	Vulnerable	NIST National Vulnerability Database
Cisco	Identity Services Engine Passive Identity Connector	version 3.1.0version 3.1.0-patch1version 3.1.0-patch10version 3.1.0-patch11version 3.1.0-patch2version 3.1.0-patch3version 3.1.0-patch4version 3.1.0-patch5 and 34 more version 3.1.0-patch6version 3.1.0-patch7version 3.1.0-patch8version 3.1.0-patch9version 3.2.0version 3.2.0-patch1version 3.2.0-patch10version 3.2.0-patch2version 3.2.0-patch3version 3.2.0-patch4version 3.2.0-patch5version 3.2.0-patch6version 3.2.0-patch7version 3.2.0-patch8version 3.2.0-patch9version 3.3.0version 3.3.0-patch1version 3.3.0-patch10version 3.3.0-patch11version 3.3.0-patch2version 3.3.0-patch3version 3.3.0-patch4version 3.3.0-patch5version 3.3.0-patch6version 3.3.0-patch7version 3.3.0-patch8version 3.3.0-patch9version 3.4.0version 3.4.0-patch1version 3.4.0-patch2version 3.4.0-patch3version 3.4.0-patch4version 3.4.0-patch5version 3.4.0-patch6	Vulnerable	NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Network

Attack complexity

Low

Privileges required

None

User interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
10.0	CVSS 3.1	Critical	3.9	6.0	psirt@cisco.com via NIST National Vulnerability Database
10.0	CVSS 3.1	Critical	—	—	GitHub, Inc. via GitHub Security Advisories
10.0	CVSS 3.1	Critical	—	—	cisco via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H (score shown at the top: psirt@cisco.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-648

Other CVEs with this weakness →

CISA KEV details CISA

CISA lists a CVE once it has evidence of exploitation against real targets.

Listed

Sep 16, 2026

Federal deadline

Sep 19, 2026

passed 26 day(s) ago

Ransomware use

Unknown

CISA records ransomware use only for campaigns it has confirmed, so “Unknown” means unrecorded, not ruled out. The deadline binds US federal agencies; for everyone else it is a reference date.

Public exploits, PoCs and detection templates

Public code that demonstrates or tests the flaw raises the odds of mass exploitation — and Nuclei templates help find vulnerable assets in your environment.

Proofs of concept on GitHub

CVE-2026-76460 ★ 2 Sep 17, 2026

Warning: public PoCs are sometimes disguised malware. Use them only for authorized testing in an isolated environment. This portal does not host exploit code — it only points to the sources.

EPSS over time FIRST

Oct 12, 2026 → Oct 14, 2026 · 3 reading(s) · max 14.03%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
Hunt retroactively in logs from before Sep 16, 2026 (KEV listing): exploitation may have started earlier.

web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

2026
Affected products added · cisco/cisco identity services engine software, cisco/cisco ise passive identity connector
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
Fix documented
Oct 13, 2026 · NIST National Vulnerability Database
Affected products added · cisco/identity services engine, cisco/identity services engine passive identity connector
Oct 13, 2026 · NIST National Vulnerability Database
CVSS changed · 10.0
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Analyzed
Oct 13, 2026 · NIST National Vulnerability Database
Added to CISA KEV (detected)
Oct 13, 2026 · CISA Known Exploited Vulnerabilities
Record created in this database
Oct 13, 2026 · CISA Known Exploited Vulnerabilities
CVE published
Sep 16, 2026 · cisco
Added to CISA KEV catalog
Sep 15, 2026 · CISA

Source activity

Repeated readings are counted rather than listed.

2× References added · Oct 13, 2026 – Oct 13, 2026
1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

4 on the record

sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ISE-ABP-VNSW7T
Mitigation, Vendor Advisory, NIST National Vulnerability Database
www.cisa.gov/known-exploited-vulnerabilities-catalog
US Government Resource, NIST National Vulnerability Database
nvd.nist.gov/vuln/detail/CVE-2026-76460
GitHub Security Advisories
github.com/advisories/GHSA-25wc-3w28-q6vw
GitHub Security Advisories

Elsewhere on this site

Cisco
every CVE for this vendor

2026-09
what else CISA listed that month

CWE-648
other pages naming this weakness

Related CVEs (same products)

High CVE-2026-20190 Cisco Identity Services Engine Information Disclosure Vulnerability Jun 17, 2026
Critical CVE-2026-20181 Cisco Identity Services Engine Remote Code Execution Vulnerability Jun 17, 2026
Medium CVE-2026-20195 Cisco Identity Services Engine Observable Response Discrepancy Vulnerability May 6, 2026
Medium CVE-2026-20193 Cisco Identity Services Engine Authentication Bypass Vulnerability May 6, 2026
Critical CVE-2026-20186 Cisco Identity Services Engine Multiple Authenticated Remote Code Execution Vulnerability Apr 15, 2026
Critical CVE-2026-20180 Cisco Identity Services Engine Multiple Remote Code Execution Vulnerability Apr 15, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-76460 is "Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability", rated Critical. It affects Cisco Identity Services Engine Software (Cisco); versions are in the scope table. It is in CISA KEV: there is evidence of real-world exploitation. CVSS 10.0 describes technical severity. EPSS 14.03% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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