Security News > 2021 > June > Cisco ASA Flaw Under Active Attack After PoC Exploit Posted Online

A security vulnerability in Cisco Adaptive Security Appliance that was addressed by the company last October, and again earlier this April, has been subjected to active in-the-wild attacks following the release of proof-of-concept exploit code.

The PoC was published by researchers from cybersecurity firm Positive Technologies on June 24, following which reports emerged that attackers are chasing after an exploit for the bug.

"Tenable has also received a report that attackers are exploiting CVE-2020-3580 in the wild," the cyber exposure company said.

Tracked as CVE-2020-3580, the issue concerns multiple vulnerabilities in the web services interface of Cisco ASA software and Cisco Firepower Threat Defense software that could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks on an affected device.

As of July 2020, there were a little over 85,000 ASA/FTD devices, 398 of which are spread across 17% of the Fortune 500 companies, according to cybersecurity company Rapid7.

Although Cisco remediated the flaw in October 2020, the network equipment company subsequently determined the fix to be "Incomplete," thereby requiring a second round of patches that were released on April 28, 2021.

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