Cisco Firepower Management Center Virtual Appliance
CVE-2021-34762
A vulnerability in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an authenticated, remote attacker to perform a directory traversal attack on an affected device. The attacker would require valid device credentials. The vulnerability is due to insufficient input validation of the HTTPS URL by the web-based management interface. An attacker could exploit this vulnerability by sending a crafted HTTPS request that contains directory traversal character sequences to an affected device. A successful exploit could allow the attacker to read or write arbitrary files on the device.
What this means for your business
- It affects Cisco Firepower Management Center Virtual Appliance. It matters if your company, or a supplier that handles your data, runs it.
- An attacker can use it remotely, over a network, with an ordinary user login, and without anyone at your company clicking anything.
- FIRST's prediction model gives it a 2% chance of attack attempts being seen in the next 30 days, ranking above 79% of all known flaws.
What to do
- 1Check whether your company or your suppliers run Cisco Firepower Management Center Virtual Appliance, and which version. The affected versions are listed further down this page.
- 2If you do, apply the vendor's fix. A patch or vendor advisory has been published.
Not sure if your company is exposed?
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Scoring
- CVSS
- 8.1 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N- Weakness
- CWE-26
- Assigned by
- psirt@cisco.com
Dates
- Published
- 2021-10-27
- Last modified
- 2026-08-11
- Sources
- NVD
Affected products
- Cisco Firepower Management Center Virtual Appliance6.2.3, 6.4.0, 6.5.0, 6.6.1, 6.6.2, 6.6.3, 6.6.4, 6.7.0, 7.0.0, 7.1.0
- Cisco Secure Firewall Threat Defense- 6.4.0.13, 6.5.0 - 6.6.5, 6.7.0 - 6.7.0.3, 7.0.0 - 7.0.1
- Cisco Sourcefire Defense Center6.2.3, 6.4.0, 6.5.0, 6.6.1, 6.6.2, 6.6.3, 6.6.4, 7.0.0
As listed in the NVD configuration data. Not a statement about your estate.