Live › vulnerability › CVE-2026-20079
Go to dashboardUnauthenticated remote attacker sends crafted HTTP requests to the FMC web interface, bypasses authentication and runs scripts as root (CWE-288, CVSS 10.0). It affects all on-prem FMC releases regardless of configuration. Cisco says it is actively exploited (since Aug 2026). There are no workarounds. Cisco SCC Firewall Management is SaaS and Cisco has already patched it. FTD, ASA, FDM and SCC are not affected. Reducing public exposure of the management interface reduces the attack surface but does not fix it.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 5h before NVD. All times on this page are UTC.
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Cisco Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management | vendor | – | – |
| Cisco Secure Firewall Management Center (FMC) | vendor | all releases below the first fixed release per train (<= 7.0.9, 7.2 < 7.2.12, 7.4 < 7.4.8, 7.6 < 7.6.6, 7.7 < 7.7.13, 10.0 < 10.0.2) | 7.0.10, 7.2.12, 7.4.8, 7.6.6, 7.7.13, 10.0.2, 10.1.0 |
| cisco secure firewall management center | vendor | = 7.0.0 | – |
| cisco secure firewall management center | vendor | = 7.0.0.1 | – |
| cisco secure firewall management center | vendor | = 7.0.1 | – |
| cisco secure firewall management center | vendor | = 7.0.1.1 | – |
| cisco secure firewall management center | vendor | = 7.0.2 | – |
| cisco secure firewall management center | vendor | = 7.0.2.1 | – |
| cisco secure firewall management center | vendor | = 7.0.3 | – |
| cisco secure firewall management center | vendor | = 7.0.4 | – |
| cisco secure firewall management center | vendor | = 7.0.5 | – |
| cisco secure firewall management center | vendor | = 7.0.6 | – |
| cisco secure firewall management center | vendor | = 7.0.6.1 | – |
| cisco secure firewall management center | vendor | = 7.0.6.2 | – |
| cisco secure firewall management center | vendor | = 7.0.6.3 | – |
| cisco secure firewall management center | vendor | = 7.0.7 | – |
| cisco secure firewall management center | vendor | = 7.0.8 | – |
| cisco secure firewall management center | vendor | = 7.0.8.1 | – |
| cisco secure firewall management center | vendor | = 7.0.9 | – |
| cisco secure firewall management center | vendor | = 7.1.0 | – |
| cisco secure firewall management center | vendor | = 7.1.0.1 | – |
| cisco secure firewall management center | vendor | = 7.1.0.2 | – |
| cisco secure firewall management center | vendor | = 7.1.0.3 | – |
| cisco secure firewall management center | vendor | = 7.2.0 | – |
| cisco secure firewall management center | vendor | = 7.2.0.1 | – |
| cisco secure firewall management center | vendor | = 7.2.1 | – |
| cisco secure firewall management center | vendor | = 7.2.2 | – |
| cisco secure firewall management center | vendor | = 7.2.3 | – |
| cisco secure firewall management center | vendor | = 7.2.3.1 | – |
| cisco secure firewall management center | vendor | = 7.2.4 | – |
| cisco secure firewall management center | vendor | = 7.2.4.1 | – |
| cisco secure firewall management center | vendor | = 7.2.5 | – |
| cisco secure firewall management center | vendor | = 7.2.5.1 | – |
| cisco secure firewall management center | vendor | = 7.2.5.2 | – |
| cisco secure firewall management center | vendor | = 7.2.6 | – |
| cisco secure firewall management center | vendor | = 7.2.7 | – |
| cisco secure firewall management center | vendor | = 7.2.8 | – |
| cisco secure firewall management center | vendor | = 7.2.8.1 | – |
| cisco secure firewall management center | vendor | = 7.2.9 | – |
| cisco secure firewall management center | vendor | = 7.2.10 | – |
| cisco secure firewall management center | vendor | = 7.2.10.1 | – |
| cisco secure firewall management center | vendor | = 7.2.10.2 | – |
7.0.10; 7.2 -> 7.2.12; 7.4 -> 7.4.8; 7.6 -> 7.6.6; 7.7 -> 7.7.13; 10.0 -> 10.0.2; 10.1 -> 10.1.0What vendors did on their customers’ behalf. Holds only for traffic through them; patching is still the fix.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
WAF Release - 2026-04-15 · Changelog
New updates and improvements at Cloudflare.
April 15, 2026
This week's release introduces a new detection for a critical Remote Code Execution (RCE) vulnerability in Mesop (CVE-2026-33057), alongside protections for high-impact vulnerabilities in Cisco Secure Firewall Management Center (CVE-2026-20079) and FortiClient EMS (CVE-2026-21643). Additionally, this release includes an update to our existing React Server DoS coverage to address recently identified resource exhaustion vectors (CVE-2026-23869).
Key Findings
Impact
Successful exploitation of these vulnerabilities could allow unauthenticated attackers to execute arbitrary code, gain administrative control over network management infrastructure, or trigger server-side resource exhaustion. Administrators are strongly encouraged to apply official vendor updates.
| Ruleset | Rule ID | Legacy Rule ID | Description | Previous Action | New Action | Comments |
|---|---|---|---|---|---|---|
| Cloudflare Managed Ruleset | ...aef9415b | N/A | Cisco Secure FMC - RCE via upgradeReadinessCall - CVE:CVE-2026-20079 | Log | Block | This is a new detection. |
| Cloudflare Managed Ruleset | ...ee7be621 | N/A | FortiClient EMS - Pre-Auth SQL Injection - CVE:CVE-2026-21643 | Log | Block | This is a new detection. |
| Cloudflare Managed Ruleset | ...c953a72b | N/A | Mesop - Remote Code Execution - Base64 Payload - CVE:CVE-2026-33057 | Log | Block | This is a new detection. |
| Cloudflare Managed Ruleset | ...50c08f6f | N/A | React Server - DOS - CVE:CVE-2026-23864 - 1 - Beta | Log | Block | This rule has been merged into the original rule "React Server - DOS - CVE:CVE-2026-23864 - 1" (ID: ...61680354) |
| Cloudflare Managed Ruleset | ...ebd81645 | N/A | XSS, HTML Injection - Link Tag - URI (beta) |
This page as .md · .json · in your agent: get_signal("CVE-2026-20079")
CISA KEV catalog, Creative Commons 0 · NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
| N/A |
| Disabled |
| This is a new detection. |
| Cloudflare Managed Ruleset | ...0af34bba | N/A | XSS, HTML Injection - Embed Tag - URI (beta) | N/A | Disabled | This is a new detection. |