---
cve: "CVE-2026-20359"
severity: "CRITICAL"
cvss: 9.9
epss: "36%"
vendor: "Cisco"
kev: false
exploited: false
published: "2026-08-19 16:18:52"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T10:32:13+02:00"
---

# CVE-2026-20359

> 9.9 CRITICAL

## Beschreibung

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Crosswork engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening release that addresses multiple internally discovered vulnerabilities.

The vulnerabilities trackled by CVE-2026-20359 are related to insufficiently protected credentials issues that are grouped under the Common Weakness Enumeration (CWE) CWE-522.

## CVSS-Vektor

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

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

## Schwachstellen-Klasse

- **CWE-522** — Insufficiently Protected Credentials
  The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.

## Angriffsmuster (CAPEC)

- [CAPEC-50 — Password Recovery Exploitation](https://capec.mitre.org/data/definitions/50.html) _(Severity: High)_
- [CAPEC-102 — Session Sidejacking](https://capec.mitre.org/data/definitions/102.html) _(Severity: High)_
- [CAPEC-474 — Signature Spoofing by Key Theft](https://capec.mitre.org/data/definitions/474.html) _(Severity: High)_
- [CAPEC-509 — Kerberoasting](https://capec.mitre.org/data/definitions/509.html) _(Severity: High)_
- [CAPEC-551 — Modify Existing Service](https://capec.mitre.org/data/definitions/551.html)
- [CAPEC-555 — Remote Services with Stolen Credentials](https://capec.mitre.org/data/definitions/555.html) _(Severity: Very High)_
- [CAPEC-560 — Use of Known Domain Credentials](https://capec.mitre.org/data/definitions/560.html) _(Severity: High)_
- [CAPEC-561 — Windows Admin Shares with Stolen Credentials](https://capec.mitre.org/data/definitions/561.html)

## ATT&CK-Techniken

- [T1552.004 — Unsecured Credentials: Private Keys](https://attack.mitre.org/techniques/T1552/004/)
- [T1558.003 — Steal or Forge Kerberos Tickets:Kerberoasting](https://attack.mitre.org/techniques/T1558/003/)
- [T1543 — Create or Modify System Process](https://attack.mitre.org/techniques/T1543/)
- [T1021 — Remote Services](https://attack.mitre.org/techniques/T1021/)
- [T1114.002 — Email Collection:Remote Email Collection](https://attack.mitre.org/techniques/T1114/002/)
- [T1133 — External Remote Services](https://attack.mitre.org/techniques/T1133/)
- [T1078 — Valid Accounts](https://attack.mitre.org/techniques/T1078/)
- [T1021.002 — Remote Services:SMB/Windows Admin Shares](https://attack.mitre.org/techniques/T1021/002/)

## Referenzen

- <https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-crosswork-UzDTU9Vh>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-20359) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_