Vulnerability in Cisco Firepower Threat Defense Software
CVE-2021-34761
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.002 (11.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Cisco Firepower Threat Defense Software
- Cisco Firepower Management Center Virtual Appliance — versions 6.2.3, 6.4.0, 6.6.1
- Cisco Firepower Threat Defense
- Cisco Secure Firewall Threat Defense
- Cisco Sourcefire Defense Center — versions 6.2.3, 6.4.0, 6.6.1
Weakness classification (CWE)
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-file… (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-34761?
- CVE-2021-34761 is a medium-severity vulnerability in Cisco Firepower Threat Defense Software, classified under External Control of File Name or Path. CVSS score: 4.4/10. Published 2021-10-27.
- How severe is CVE-2021-34761?
- Medium severity. CVSS v3 base score is 4.4 out of 10.