Path Traversal in Cisco Firepower Threat Defense Software
CVE-2021-1256
A vulnerability in the CLI of Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to overwrite files on the file system of an affected device by using directory traversal techniques. A successful exploit could cause system instability if important system files are overwritten. This vulnerability is due to insufficient validation of user input for the file path in a specific CLI command. An attacker could exploit this vulnerability by logging in to a targeted device and issuing a specific CLI command with crafted user input. A successful exploit could allow the attacker to overwrite arbitrary files on the file system of the affected device. The attacker would need valid user credentials on the device.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (40.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-file… (vendor-advisory, Vendor Advisory)
- kc.mcafee.com/corporate/index (Third Party Advisory, Not Applicable)
Frequently asked questions
- What is CVE-2021-1256?
- CVE-2021-1256 is a medium-severity vulnerability in Cisco Firepower Threat Defense Software, classified under Files or Directories Accessible to External Parties. CVSS score: 6.0/10. Published 2021-04-29.
- How severe is CVE-2021-1256?
- Medium severity. CVSS v3 base score is 6.0 out of 10.