CVE-2022-0028
8.6, high Known exploitedPalo Alto Networks PAN-OS Reflected Amplification Denial-of-Service Vulnerability
- CVSS
- 8.6, high high CVSS v3.1
- EPSS, next 30 days
- 3% higher than 84.7% of scored CVEs
- Exploitation
- Confirmed in the wild
- Published
- 10 Aug 20224 years ago
Known exploited
CISA added this to the Known Exploited Vulnerabilities Catalog on 22 Aug 2022. US federal agencies had to remediate by 12 Sept 2022, a deadline that has passed.
Required action. Apply updates per vendor instructions.
Description
A PAN-OS URL filtering policy misconfiguration could allow a network-based attacker to conduct reflected and amplified TCP denial-of-service (RDoS) attacks. The DoS attack would appear to originate from a Palo Alto Networks PA-Series (hardware), VM-Series (virtual) and CN-Series (container) firewall against an attacker-specified target. To be misused by an external attacker, the firewall configuration must have a URL filtering profile with one or more blocked categories assigned to a source zone that has an external facing interface. This configuration is not typical for URL filtering and, if set, is likely unintended by the administrator. If exploited, this issue would not impact the confidentiality, integrity, or availability of our products. However, the resulting denial-of-service (DoS) attack may help obfuscate the identity of the attacker and implicate the firewall as the source of the attack. We have taken prompt action to address this issue in our PAN-OS software. All software updates for this issue are expected to be released no later than the week of August 15, 2022. This issue does not impact Panorama M-Series or Panorama virtual appliances. This issue has been resolved for all Cloud NGFW and Prisma Access customers and no additional action is required from them.
Details
- Vendor
- Palo Alto Networks and 1 more
- Product
- Cloud NGFW
- Weakness
- CWE-406 (opens in a new tab)
- Status
- Analyzed
- Updated
- 17 Jun 2026
- Assigner
- psirt@paloaltonetworks.com
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
References 2
The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.
Other Palo Alto Networks CVEs
Every Palo Alto Networks CVE we holdSame vendor in what we hold, not a known link between the flaws.
- CVE-2026-0322 Palo Alto Networks PAN-OS Code Injection Vulnerability KEV EPSS 1% 7.2, high
- CVE-2026-0257 Palo Alto Networks PAN-OS Authentication Bypass Vulnerability KEV EPSS 97% 9.1, critical
- CVE-2026-0300 Palo Alto Networks PAN-OS Out-of-bounds Write Vulnerability KEV EPSS 32% 9.8, critical
- CVE-2025-0108 Palo Alto Networks PAN-OS Authentication Bypass Vulnerability KEV EPSS 98% 9.1, critical
- CVE-2025-0111 Palo Alto Networks PAN-OS File Read Vulnerability KEV EPSS 2% 6.5, medium
- CVE-2024-3393 Palo Alto Networks PAN-OS Malicious DNS Packet Vulnerability KEV EPSS 29% 7.5, high
- CVE-2024-0012 Palo Alto Networks PAN-OS Management Interface Authentication Bypass Vulnerability KEV EPSS 100% 9.8, critical
- CVE-2024-9474 Palo Alto Networks PAN-OS Management Interface OS Command Injection Vulnerability KEV EPSS 95% 7.2, high
Beyond this page
Is CVE-2022-0028 in your network?
This page tells you how dangerous CVE-2022-0028 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.
CVE-2022-0028 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.
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EXYS7600 OCELOT
Find it before attackers do
Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2022-0028 comes with the devices to patch.
Learn more about EXYS7600 OCELOT -
EXYS7950 KONDRA
Detect it if it's exploited
Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.
Learn more about EXYS7950 KONDRA
Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 18 Oct 2026, not the live upstream state.