Vulnerability in Cisco Firepower Threat Defense (FTD) Software (CVE-2021-1256)
Summary
Vulnerability in Cisco Firepower Threat Defense (FTD) Software (CVE-2021-1256). Data can be tampered with by attackers.
Original description
The description as published by the source.
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.
Source: NIST National Vulnerability Database NVD
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2021-1256 has been found in Cisco Firepower Threat Defense (FTD) Software.
Data can be tampered with by attackers. CVSS score: 6.0/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Cisco Firepower Threat Defense (FTD) Software CVE-2021-1256" on the vendor's site.
CVE-2021-1256 (Cisco Firepower Threat Defense (FTD) Software) — CWE-552 / CVSS v3 6.0
Attack vector: local / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-552) exists in Cisco Firepower Threat Defense (FTD) Software.
Check the vendor advisory for the affected versions of Cisco Firepower Threat Defense (FTD) Software.
Severity: Medium (CVSS 6.0/10). Data can be tampered with by attackers.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Cisco Firepower Threat Defense (FTD) Software を使っているサービスとバージョンを洗い出す。
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2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- advisory kc.mcafee.com
- patch tools.cisco.com