---
cve: "CVE-2026-76431"
severity: "MEDIUM"
cvss: 4.9
epss: "1.2%"
vendor: "Cisco"
kev: false
exploited: false
published: "2026-09-16 21:17:14"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-10-28T02:32:48+01:00"
---

# CVE-2026-76431

> 4.9 MEDIUM

## Beschreibung

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.

## CNA-Record (Kanon, cvelistV5)

- CNA: **cisco**
- State: PUBLISHED
- Stand: 2026-09-19 14:21:54
- CNA-CVSS: **4.9** (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Hoch | good |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Schwachstellen-Klasse

- **CWE-22** — Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
  The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

## Angriffsmuster (CAPEC)

- [CAPEC-64 — Using Slashes and URL Encoding Combined to Bypass Validation Logic](https://capec.mitre.org/data/definitions/64.html) _(Severity: High)_
- [CAPEC-76 — Manipulating Web Input to File System Calls](https://capec.mitre.org/data/definitions/76.html) _(Severity: Very High)_
- [CAPEC-78 — Using Escaped Slashes in Alternate Encoding](https://capec.mitre.org/data/definitions/78.html) _(Severity: High)_
- [CAPEC-79 — Using Slashes in Alternate Encoding](https://capec.mitre.org/data/definitions/79.html) _(Severity: High)_
- [CAPEC-126 — Path Traversal](https://capec.mitre.org/data/definitions/126.html) _(Severity: Very High)_

## BSI-Hinweise (deutsch)

- [Cisco ISE und ISE-PIC: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2026-3425) — _BSI-Einstufung: hoch_
  Ein Angreifer kann mehrere Schwachstellen in Cisco Identity Services Engine (ISE) und ISE-PIC ausnutzen, um beliebigen Code auszuführen – sogar mit Root-Rechten –, Sicherheitsmaßnahmen zu umgehen, Berechtigungen zu erweitern, SQL-Injection-Angriffe durchzuführen, Sitzungen zu übernehmen, sensible Informationen oder Anmeldedaten offenzulegen, Daten zu manipulieren, einen Denial-of-Service-Zustand auszulösen und Cross-Site-Scripting-Angriffe durchzuführen.

## Referenzen

- <https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multi-traversal-WDTgYCdn>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-76431/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_