---
cve: "CVE-2026-20333"
severity: "HIGH"
cvss: 8.8
epss: "0.3%"
vendor: "Cisco"
kev: false
exploited: false
published: "2026-09-16 20:14:31"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T21:59:11+02:00"
---

# CVE-2026-20333

> 8.8 HIGH

## Beschreibung

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Secure Adaptive Security Appliance Software, Cisco Secure Firewall Threat Defense Software and Cisco Secure Firewall Management Center Software 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 tracked by CVE-2026-20333 are related to incorrect comparison conditions that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-697.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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 | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Schwachstellen-Klasse

- **CWE-697** — Incorrect Comparison
  The product compares two entities in a security-relevant context, but the comparison is incorrect.

## Angriffsmuster (CAPEC)

- [CAPEC-3 — Using Leading 'Ghost' Character Sequences to Bypass Input Filters](https://capec.mitre.org/data/definitions/3.html) _(Severity: Medium)_
- [CAPEC-10 — Buffer Overflow via Environment Variables](https://capec.mitre.org/data/definitions/10.html) _(Severity: High)_
- [CAPEC-14 — Client-side Injection-induced Buffer Overflow](https://capec.mitre.org/data/definitions/14.html) _(Severity: High)_
- [CAPEC-15 — Command Delimiters](https://capec.mitre.org/data/definitions/15.html) _(Severity: High)_
- [CAPEC-24 — Filter Failure through Buffer Overflow](https://capec.mitre.org/data/definitions/24.html) _(Severity: High)_
- [CAPEC-120 — Double Encoding](https://capec.mitre.org/data/definitions/120.html) _(Severity: Medium)_
- [CAPEC-182 — Flash Injection](https://capec.mitre.org/data/definitions/182.html) _(Severity: Medium)_
- [CAPEC-267 — Leverage Alternate Encoding](https://capec.mitre.org/data/definitions/267.html) _(Severity: High)_

## ATT&CK-Techniken

- [T1027 — Obfuscated Files or Information](https://attack.mitre.org/techniques/T1027/)

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-20333) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_