Unauthenticated device access via API authentication bypass
Published Sep 16, 2026 · Updated Oct 7, 2026
Authentication bypass in Cisco Identity Services Engine and ISE Passive Identity Connector 3.1 through 3.5 allows remote attackers to access devices. An API endpoint accepts crafted unauthenticated requests without enforcing the authentication control applied by the web management interface. The endpoint is affected regardless of device configuration, and successful access can lead to command execution with root privileges.
Summary
What happened
Authentication bypass in Cisco Identity Services Engine and ISE Passive Identity Connector 3.1 through 3.5 allows remote attackers to access devices. An API endpoint accepts crafted unauthenticated requests without enforcing the authentication control applied by the web management interface. The endpoint is affected regardless of device configuration, and successful access can lead to command execution with root privileges.
The record
- CVE
- CVE-2026-76460
- Published
- Sep 16, 2026
- Updated
- Oct 7, 2026
- Vendor
- Clam AntiVirus
- Product
- Cisco Identity Services Engine
- Classifications
- CWE-648, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 16, 2026CVE publishedPublication date reported by the CVE source.
- Oct 7, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=3.1.0 p10
- Affected versionversion=3.1.0 p11
- Affected versionversion=3.1.0 p8
- Affected versionversion=3.1.0 p9
- Affected versionversion=3.2.0 p7
- Affected versionversion=3.2 Patch 10
- Affected versionversion=3.2 Patch 8
- Affected versionversion=3.2 Patch 9
- Affected versionversion=3.3 Patch 1
- Affected versionversion=3.3 Patch 10
- Affected versionversion=3.3 Patch 11
- Affected versionversion=3.3 Patch 2
- Affected versionversion=3.3 Patch 3
- Affected versionversion=3.3 Patch 4
- Affected versionversion=3.3 Patch 5
- Affected versionversion=3.3 Patch 6
- Affected versionversion=3.3 Patch 7
- Affected versionversion=3.3 Patch 8
- Affected versionversion=3.3 Patch 9
- Affected versionversion=3.4.0
- Affected versionversion=3.4 Patch 1
- Affected versionversion=3.4 Patch 2
- Affected versionversion=3.4 Patch 3
- Affected versionversion=3.4 Patch 4
- Affected versionversion=3.4 Patch 5
- Affected versionversion=3.4 Patch 6
- Affected versionversion=3.5.0
- Affected versionversion=3.5 Patch 1
- Affected versionversion=3.5 Patch 2
- Affected versionversion=3.5 Patch 3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Reported exploitation
- Cisco PSIRT active exploitation reportreported exploitation
- CISA Known Exploited Vulnerabilities listingknown exploited catalog
Technologies
Your stack
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Your stack
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