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Mallory
Medium

Authenticated CLI command injection in Cisco Secure FTD Software (root OS command execution)

IdentifiersCVE-2026-20017CWE-78

A command injection vulnerability in the Cisco Secure FTD Software CLI allows an authenticated local attacker with valid administrative credentials to execute arbitrary commands on the underlying operating system with root privileges. The issue is caused by insufficient input validation of user-supplied CLI command arguments; by supplying crafted input to a specific CLI command, an attacker can inject and execute OS-level commands as root.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation results in root-level command execution on the underlying operating system of the affected Cisco Secure FTD device, enabling full compromise of the device (e.g., arbitrary command execution with highest privileges).

Mitigation

If you can’t patch tonight, do this now.

Information currently not available in the provided content beyond the requirement for administrative credentials; no additional mitigations are specified.

Remediation

Patch, then assume compromise.

Information currently not available in the provided content (no fixed versions or patch guidance included).
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
Cisco SystemsSecure Ftd Softwareapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity1

Community discussion across Reddit, Mastodon, and other social sources.