4.8Medium
Cisco Firepower Management Center Virtual Appliance
CVE-2021-34764
Multiple vulnerabilities in the web-based management interface of Cisco Firepower Management Center (FMC) Software could allow an attacker to execute a cross-site scripting (XSS) attack or an open redirect attack. For more information about these vulnerabilities, see the Details section of this advisory.
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 administrator login, but only after tricking someone into an action such as opening a file or a link.
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?
Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.
Scoring
- CVSS
- 4.8 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N- Weakness
- CWE-601
- Assigned by
- psirt@cisco.com
Dates
- Published
- 2021-10-27
- Last modified
- 2026-08-11
- Sources
- NVD
Affected products
- Cisco Firepower Management Center Virtual Appliance6.1.0, 6.2.0, 6.2.3, 6.3.0, 6.4.0, 6.5.0, 6.6.0, 6.6.1, 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
- Cisco Sourcefire Defense Center6.1.0, 6.2.0, 6.2.3, 6.3.0, 6.4.0, 6.5.0, 6.6.0, 6.6.1, 6.7.0, 7.0.0, 7.1.0
As listed in the NVD configuration data. Not a statement about your estate.