VULNERABILITY INTELLIGENCE

CVE-2021-34761

CVSS score4.4 MEDIUM
EPSS probability0.22%
CISA KEVNot currently listed
Published2021-10-27
Last modified2026-08-11
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

Description

A vulnerability in Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to overwrite or append arbitrary data to system files using root-level privileges. The attacker must have administrative credentials on the device. This vulnerability is due to incomplete validation of user input for a specific CLI command. An attacker could exploit this vulnerability by authenticating to the device with administrative privileges and issuing a CLI command with crafted user parameters. A successful exploit could allow the attacker to overwrite or append arbitrary data to system files using root-level privileges.

Weakness classification

  • CWE-73: External Control of File Name or Path
  • CWE-668: Exposure of Resource to Wrong Sphere

Primary references