# CVE-2022-0028: Palo Alto Networks PAN-OS Reflected Amplification Denial-of-Service Vulnerability

Source: https://junglewise.ai/threats/cve-2022-0028-palo-alto-networks-pan-os-reflected-amplification-denial-of  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-08-22. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2022-0028 · Severity: critical · CVSS 8.6 · Exploited in the wild · Published 2022-08-22

A misconfiguration in Palo Alto Networks PAN-OS URL filtering policies allows network-based attackers to perform reflected and amplified TCP denial-of-service (RDoS) attacks. The vulnerability occurs when a URL filtering profile with blocked categories is assigned to a source zone with an external-facing interface, causing the firewall to appear as the source of the attack against a specified target.

Technologies: [Palo Alto Networks PAN-OS](https://junglewise.ai/threats/technologies/pan-os). Vendors: [Palo Alto Networks](https://junglewise.ai/threats/vendors/palo-alto-networks).

## Quick answers

**Is CVE-2022-0028 exploited in the wild?** Yes. CVE-2022-0028 is known to be exploited in the wild, first recorded on 22 August 2022. Treat it as urgent.

**How severe is CVE-2022-0028?** Critical severity, with a CVSS score of 8.6, published 22 August 2022.

**Which products and versions are affected?** Palo Alto Networks PAN-OS 8.1 to 8.1.23-h1, 9.0 to 9.0.16-h3, 9.1 to 9.1.14-h4, 10.0 to 10.0.11-h1, 10.1 to 10.1.6-h6, 10.2 to 10.2.2-h2.

**Is there a fix for CVE-2022-0028?** A patch was published on 2022-08-15: Software updates released the week of August 15, 2022. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2022-0028 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2022-0028?** Check whether you run Palo Alto Networks PAN-OS. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Palo Alto Networks PAN-OS 8.1 to 8.1.23-h1, 9.0 to 9.0.16-h3, 9.1 to 9.1.14-h4, 10.0 to 10.0.11-h1, 10.1 to 10.1.6-h6, 10.2 to 10.2.2-h2

## Timeline

- 2022-08-15: patched: Software updates released the week of August 15, 2022.
- 2022-08-22: disclosed
- 2022-08-22: kev added: Added to CISA Known Exploited Vulnerabilities Catalog.
- 2022-08-22: exploited: Reported as exploited in the wild.

## Related threats

- [Palo Alto Networks PAN-OS information disclosure via dataplane interface](https://junglewise.ai/threats/cve-2026-0331-an-information-disclosure-vulnerability-in-palo-alto-networks-pan)
- [Palo Alto Networks PAN-OS buffer overflow denial of service](https://junglewise.ai/threats/cve-2026-0329-a-buffer-overflow-vulnerability-in-palo-alto-networks-pan-os)
- [Palo Alto Networks PAN-OS authentication bypass in GlobalProtect](https://junglewise.ai/threats/cve-2026-0328-authentication-bypass-vulnerabilities-in-the-globalprotect-portal)
- [Palo Alto Networks PAN-OS privilege escalation in GlobalProtect](https://junglewise.ai/threats/cve-2026-0327-a-privilege-escalation-vulnerability-in-the-globalprotect-gateway)
- [Palo Alto Networks PAN-OS buffer overflow in protocol and service processing](https://junglewise.ai/threats/cve-2026-0326-a-buffer-overflow-vulnerability-in-palo-alto-networks-pan-os)