Denial of service in Cisco Firepower Management Center

Published: 2021-01-18
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-1267
Exploitation vector Network
Public exploit N/A
Vulnerable software
Cisco Firepower Management Center
Client/Desktop applications / Antivirus software/Personal firewalls


Security Advisory

This security advisory describes one low risk vulnerability.

1) XML Entity Expansion

Risk: Low

CVSSv3: 3.8 [CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-1267

CWE-ID: CWE-776 - Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

Exploit availability: No


The vulnerability allows a remote attacker to perform a denial o service (DoS) attack. 

The vulnerability exists due to improper restrictions on XML entities in the dashboard widget. A remote authenticated attacker can craft an XML-based widget on an affected server and cause a denial of service condition on the target system.


Install updates from vendor's website.

Vulnerable software versions

Cisco Firepower Management Center: before 6.6.1

CPE External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.