CVE intelligence and bounded remediation

CVE-2024-20261 — Cisco Firepower Threat Defense security vulnerability

Medium CVSS 5.8

A vulnerability in the file policy feature that is used to inspect encrypted archive files of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass a configured file policy to block an encrypted archive file. This vulnerability exists because of a logic error when a specific class of encrypted archive files is inspected. An attacker could exploit this vulnerability by sending a crafted, encrypted archive file through the affected device. A successful exploit could allow the attacker to send an encrypted archive file, which could contain malware and should have been blocked and dropped at the Cisco FTD device.

Severity
Medium
CVSS
5.8 (3.1)
Published
2024-05-22
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-284

Affected products

  • cisco / firepower_threat_defense / 6.2.3
  • cisco / firepower_threat_defense / 6.2.3.1
  • cisco / firepower_threat_defense / 6.2.3.2
  • cisco / firepower_threat_defense / 6.2.3.3
  • cisco / firepower_threat_defense / 6.2.3.4
  • cisco / firepower_threat_defense / 6.2.3.5

Showing 6 representative product identities from 73 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Authorization bypass, IDOR, and cross-tenant access

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Check exposure

  • Map object and action authorization checks across API, UI, batch, import/export, and background-job paths.
  • Identify tenant, ownership, role, and policy boundaries for affected resources and administrative operations.
  • Use synthetic fixtures to compare intended access matrices without accessing another user's real data.

Remediate safely

  • Enforce server-side authorization at each resource access and state transition using the authenticated principal and trusted tenant context.
  • Scope data queries by tenant and ownership; treat client-supplied identifiers, roles, and policy claims as untrusted.
  • Add deny-by-default policy tests for horizontal and vertical access across every affected transport.

Authoritative sources

Complete CVE record and remediation plan

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