PatchTheCEVCVE-2026-76460: Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability
92
Patch now
CRITICAL 10.0EXPLOITEDREMOTEDOWNGRADEDOWNGRADE
CVE-2026-76460 is a critical-severity flaw (CVSS 10.0) affecting identity services engine, identity services engine passive identity connector, reported as exploited in the wild. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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-b
Why this priority
- Critical severity
- EPSS top 3%: very likely to be exploited
- Exploited in the wild (CISA KEV)
- CISA SSVC: automatable with total technical impact
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 10.0 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 14.0% (top 3%) |
| CISA exploited list | Yes, fix due 2026-09-19 |
| Weakness | CWE-648 |
| Published | 2026-09-16 |
| Last modified | 2026-10-07 |
Publisher (CNA): Cisco Systems, Inc. · Vendor: cisco
Am I affected?
Timeline
- Exploited Added to the CISA Known Exploited Vulnerabilities list
- Published CVE record published
- Deadline CISA due date for US federal agencies to patch
- Updated Record last modified
cisco identity services engine DOWNGRADE
Affected: 3.1.0 · 3.1.0 patch1 · 3.1.0 patch10 · 3.1.0 patch11 · 3.1.0 patch2 · 3.1.0 patch3 · 3.1.0 patch4 · 3.1.0 patch5
Fixed in: no fixed release known
Safe to downgrade to: a release before 3.1.0
1. Check installed version
apt-cache policy identity-services-engine || rpm -q identity-services-engine || identity-services-engine --version
2. No fixed release: DOWNGRADE to a release before 3.1.0 (Debian / Ubuntu)
apt-cache madison identity-services-engine
sudo apt install identity-services-engine=<VERSION_BEFORE_3.1.0>
sudo apt-mark hold identity-services-engine
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list identity-services-engine
sudo dnf downgrade identity-services-engine-<VERSION_BEFORE_3.1.0>
sudo dnf versionlock add identity-services-engine
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
cisco identity services engine passive identity connector DOWNGRADE
Affected: 3.1.0 · 3.1.0 patch1 · 3.1.0 patch10 · 3.1.0 patch11 · 3.1.0 patch2 · 3.1.0 patch3 · 3.1.0 patch4 · 3.1.0 patch5
Fixed in: no fixed release known
Safe to downgrade to: a release before 3.1.0
1. Check installed version
apt-cache policy identity-services-engine-passive-identity-connector || rpm -q identity-services-engine-passive-identity-connector || identity-services-engine-passive-identity-connector --version
2. No fixed release: DOWNGRADE to a release before 3.1.0 (Debian / Ubuntu)
apt-cache madison identity-services-engine-passive-identity-connector
sudo apt install identity-services-engine-passive-identity-connector=<VERSION_BEFORE_3.1.0>
sudo apt-mark hold identity-services-engine-passive-identity-connector
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list identity-services-engine-passive-identity-connector
sudo dnf downgrade identity-services-engine-passive-identity-connector-<VERSION_BEFORE_3.1.0>
sudo dnf versionlock add identity-services-engine-passive-identity-connector
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Exact fixes by distribution
A distro patch exists: prefer upgrading over downgrading.
Fedora 46 · uv · FIXED · 0.13.5-1.fc46 · FEDORA-2026-61ea5a28c6 · source
sudo dnf upgrade --advisory=FEDORA-2026-61ea5a28c6
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- GitHub PoC: S3v3n-JG/CVE-2026-76460 (2 stars)
- Nuclei scan template: Cisco Identity Services Engine - ise-kong API Gateway Authentication Bypass
Verify at the official source NVD · CVE Program · CISA KEV catalog · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.