# CVE-2026-76460 — Cisco Identity Services Engine Software

**CISA KEV**

> As of 2026-09-17, CVE-2026-76460 is a CRITICAL-severity vulnerability in Cisco Identity Services Engine Software, CVSS v3.1 10. It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-09-16), with a US federal remediation deadline of 2026-09-19. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-76460, most recently “CISA KEV Catalog Addition: Active Exploitation of Cisco ISE Authentication Bypass (CVE-2026-76460) and Acronis Backup Privilege Escalation (CVE-2026-87886)”.

**Last updated:** 2026-09-17

## What is CVE-2026-76460?

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.

The record classifies CVE-2026-76460 under weakness class [CWE-648](https://cwe.mitre.org/data/definitions/648.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 2 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 10 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **CISA KEV:** Listed since 2026-09-16, federal remediation deadline 2026-09-19
- **Threadlinqs priority:** 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- **Published:** 2026-09-16, last modified 2026-09-17

## Is CVE-2026-76460 being exploited?

CISA added CVE-2026-76460 to the Known Exploited Vulnerabilities catalog on 2026-09-16, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-09-19 under BOD 22-01. It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **Cisco**: Identity Services Engine Software, ISE Passive Identity Connector

## How to fix CVE-2026-76460

Because CVE-2026-76460 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-09-19. No vendor patch reference has been recorded for CVE-2026-76460 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-76460

1 tracked threat in the Threadlinqs corpus references CVE-2026-76460, either in the campaign’s CVE list or as an indicator on the campaign record.

- [CISA KEV Catalog Addition: Active Exploitation of Cisco ISE Authentication Bypass (CVE-2026-76460) and Acronis Backup Privilege Escalation (CVE-2026-87886)](https://intel.threadlinqs.com/threat/TL-2026-2542) — CRITICAL · 2026-09-16

## Sources

Enriched from CVE.org, NVD, CISA KEV, GitHub Security Advisories. Last verified by Threadlinqs on 2026-09-17. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [sec.cloudapps.cisco.com](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ISE-ABP-VNSW7Tn5)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-76460
Full detection coverage and IOCs for threats exploiting CVE-2026-76460 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp