CVE-2026-76431: Cisco Identity Services Engine Arbitrary File Deletion Vulnerability
Telemetry drift only. No threshold crossed and no authority ruling changed.
CVE record, CISA KEV and EPSS as of 2026-10-18.
CVEs like this one computed, by meaning
What to do now held facts and links
- Upgrade to the fixed version for your release line, or later: identity services engine 3.3.0; identity services engine passive identity connector 3.3.0 upper bounds of the CVE record's affected ranges
- Record your decision, dated and frozen with today's evidence: patch by a date · mitigated by a compensating control · deferred · accepted the risk · not affected
- Check your version against the ranges this record publishes.
What it is stated by the CNA
A vulnerability in the file management function of the web-based management interface of Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to delete arbitrary files and directories on an affected device. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to improper validation of directory traversal character sequences in a user-supplied file path before the request is validated. An attacker could exploit this vulnerability by sending a crafted request to the web-based management interface of an affected device. A successful exploit could allow the attacker to delete arbitrary files and directories on the underlying operating system of the affected device.
- weakness
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
- affected
- Cisco Identity Services Engine Software; Cisco ISE Passive Identity Connector
- published ranges
- cisco identity services engine >= 3.1.0 < 3.3.0; cisco identity services engine 3.3.0-patch1; cisco identity services engine 3.3.0-patch10; cisco identity services engine 3.3.0-patch11; and 38 more on the CVE page
- first unaffected version, by branch
- identity services engine 3.3.0; identity services engine passive identity connector 3.3.0
- severity
- 4.9 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
- assigned by
- cisco
- published
- 2026-09-16
check us sec.cloudapps.cisco.com
Exploit code held, dated
- exploit code
- None held in the PoC-in-GitHub feed. A public repository changes this brief.
What moved held, dated
| date | EPSS | event |
|---|---|---|
| 17 Sep 2026 | 0.01132 | |
| 28 Sep 2026 | 0.01215 |
2 observations held. A step marked with a scoring model moved because the measurement was replaced, not because the vulnerability changed.
Outside the record researched, cited
This section reads the record's references and adds cited findings from outside it. It needs an account. Everything above is held facts and is complete without it.
What would change this brief held, dated
- CISA KEV
- Not listed in the catalogue we hold. A listing changes this brief.
- exploit probability
- 0.01 on 2026-09-28 (FIRST's EPSS, a probability and not evidence of exploitation). Next band line: 10% (0.10). Crossing a line changes this brief.
- fix
- Held: identity services engine 3.3.0; identity services engine passive identity connector 3.3.0. A newer fix from the CNA or OSV changes this brief.
How to check this
Every value above is held with two dates: when it was true upstream (as_of) and when we recorded it (tx_from). Re-derive the exploit probability as it stood on any date:
SELECT value, source, source_version, as_of, tx_from
FROM volatile_valid_as_of('CVE-2026-76431', '2026-11-01T23:59:59.999999Z', now());