High Threat Security Alert (A21-04-12): Multiple Vulnerabilities in Cisco Products
29 April 2021
Last update on:
28 June 2021
Cisco released security advisories to address multiple vulnerabilities in Cisco devices and software. For information about the vulnerabilities and the attacking vectors, please refer to the corresponding security advisories at the vendor's website.
Further to our Security Alert (A21-04-12), a proof-of-concept and workable exploit code against a cross-site scripting (XSS) vulnerability (CVE-2020-3580) in Cisco ASA devices has been publicly available on the Internet. A successful exploitation could lead to arbitrary script code execution on an affected system. System administrators are advised to take immediate actions to patch your affected systems to mitigate the elevated risk of cyber attacks.
Cisco products running Cisco Firepower Management Center (FMC) Software
Cisco Firepower Device Manager
For detailed information of the affected products, please refer to the section "Affected Products" of corresponding security advisory at vendor's website.
Depending on the vulnerabilities being exploited, a successful exploitation could lead to arbitrary command injection, cross-site scripting, denial of service, information disclosure, buffer overflow, security restriction bypass, data tampering, or take control of affected system.
Software updates for affected systems are now available. System administrators of affected systems should follow the recommendations provided by the product vendor and take immediate actions to mitigate the risk. For detailed information of the available patches, please refer to the section "Fixed Software" of corresponding security advisory at vendor's website.
System administrators should contact their product support vendors for the fixes and assistance.