--- title: "CVE-2022-0028: PAN-OS: Reflected Amplification… | CubePath" description: "A PAN-OS URL filtering policy misconfiguration could allow a network-based attacker to conduct reflected and amplified TCP denial-of-service (RDoS)…" language: en source: https://cubepath.com/security/cve/CVE-2022-0028 --- # CVE-2022-0028: PAN-OS: Reflected Amplification… | CubePath ## 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. Official description from the CVE record, published by palo\_alto. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2022-0028) ## Key data ### CVSS 3.1 High 8.6 Score published by palo\_alto in the CVE record. CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | Metric | Value | What it means | | ---------------------- | ------- | ----------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | None | No account or privileges are needed. | | User interaction | None | No action from any user is needed. | | Scope | Changed | The impact can reach other components beyond the vulnerable one. | | Confidentiality impact | None | No effect on the secrecy of data. | | Integrity impact | None | No effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.02690 (2.7% probability) Percentile 86.0% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA Known Exploited Vulnerabilities This CVE is listed in the CISA KEV catalog. Name in the catalog Palo Alto Networks PAN-OS Reflected Amplification Denial-of-Service Vulnerability Added to the catalog Aug 22, 2022 Federal due date Sep 12, 2022 ### CISA assessment as of Jan 27, 2025 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Recorded by CISA as active Automatable yes Technical impact partial ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-406](https://cwe.mitre.org/data/definitions/406.html) Insufficient Control of Network Message Volume (Network Amplification) ## Affected products Products listed in the CVE record, as the CNA published them. - Palo Alto Networks Cloud NGFW - unaffected: All - Palo Alto Networks PAN-OS - affected: 8.1 up to before 8.1.23-h1 - affected: 9.0 up to before 9.0.16-h3 - affected: 9.1 up to before 9.1.14-h4 - affected: 10.0 up to before 10.0.11-h1 - affected: 10.1 up to before 10.1.6-h6 - affected: 10.2 up to before 10.2.2-h2 - Palo Alto Networks Prisma Access - unaffected: 2.1 All - unaffected: 2.2 All - unaffected: 3.0 All - unaffected: 3.1 All ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [security.paloaltonetworks.com/CVE-2022-0028](https://security.paloaltonetworks.com/CVE-2022-0028) ## Timeline 1. ID reserved Dec 28, 2021 2. Record published Aug 10, 2022 3. Added to CISA KEV Aug 22, 2022 4. Record last updated Oct 21, 2025 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:27 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)