WAF emergency protections for Cisco CVE-2025-20363, CVE-2025-20333, CVE-2025-20362
Cloudflare released emergency WAF rules to protect against critical Cisco Secure Firewall vulnerabilities that allow remote code execution and privilege escalation through improper input validation in HTTP(S) requests. New detections have been disabled by default pending further validation.
This week highlights multiple critical Cisco vulnerabilities (CVE-2025-20363, CVE-2025-20333, CVE-2025-20362). This flaw stems from improper input validation in HTTP(S) requests. An authenticated VPN user could send crafted requests to execute code as root, potentially compromising the device.
Key Findings
- Cisco (CVE-2025-20333, CVE-2025-20362, CVE-2025-20363): Multiple vulnerabilities that could allow attackers to exploit unsafe deserialization and input validation flaws. Successful exploitation may result in arbitrary code execution, privilege escalation, or command injection on affected systems.
Impact
Cisco (CVE-2025-20333, CVE-2025-20362, CVE-2025-20363): Exploitation enables attackers to escalate privileges or achieve remote code execution via command injection.
| Ruleset | Rule ID | Legacy Rule ID | Description | Previous Action | New Action | Comments |
|---|---|---|---|---|---|---|
| Cloudflare Managed Ruleset | ...9ee0ab84 | 100788 | Cisco Secure Firewall Adaptive Security Appliance - Remote Code Execution - CVE:CVE-2025-20333, CVE:CVE-2025-20362, CVE:CVE-2025-20363 | N/A | Disabled | This is a New Detection |
| Cloudflare Managed Ruleset | ...d30f768e | 100788A | Cisco Secure Firewall Adaptive Security Appliance - Remote Code Execution - CVE:CVE-2025-20333, CVE:CVE-2025-20362, CVE:CVE-2025-20363 | N/A | Disabled | This is a New Detection |
Source: original entry ↗
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