CISA Warns of Active Exploitation of Palo Alto Networks’ PAN-OS Vulnerability

The U.S. Cybersecurity and Infrastructure Security Agency on Monday added a security flaw impacting Palo Alto Networks PAN-OS to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation.

The high-severity vulnerability, tracked as CVE-2022-0028, is a URL filtering policy misconfiguration that could allow an unauthenticated, remote attacker to carry out reflected and amplified TCP denial-of-service attacks.

“If exploited, this issue would not impact the confidentiality, integrity, or availability of our products,” Palo Alto Networks said in an alert.

“However, the resulting denial-of-service attack may help obfuscate the identity of the attacker and implicate the firewall as the source of the attack.”

The networking equipment maker said it discovered the vulnerability after being notified that susceptible firewall appliances from different vendors, including Palo Alto Networks, were being used as part of an attempted reflected denial-of-service attack.

In light of active exploitation, customers of affected products are advised to apply the relevant patches to mitigate potential threats.

Share this article on social media:

Subscribe to Our Newsletter!
Stay on top of cybersecurity risks, evolving threats and industry news.

The Latest Cybersecurity News

From major cyberattacks, newly discovered critical vulnerabilities to recommended best practices, read it here first:

Tell us about your needs.
Get an answer the same business day.

Tell us about your needs.
Get an answer the same business day.

Fill out the form below and get an answer from our experts within 1 business day.

Got an urgent request? Call us at 1-877-805-7475 or Book a meeting.


What happens next:

  • We reach out to learn about your objectives
  • We work together to define your project's scope
  • You get an all-inclusive, no engagement proposal

This field is for validation purposes and should be left unchanged.
Scroll to Top


Enter Your
Corporate Email

This site is registered on as a development site.