CVE-2022-0028: in the CISA KEV catalogue
Palo Alto Networks PAN-OS Reflected Amplification Denial-of-Service Vulnerability. CISA added CVE-2022-0028 to the Known Exploited Vulnerabilities catalogue on 2022-08-22 with a default due date of 2022-09-12. Known ransomware campaign use: Unknown. Forensic triage flag: No.
A Palo Alto Networks PAN-OS URL filtering policy misconfiguration could allow a network-based attacker to conduct reflected and amplified TCP denial-of-service (RDoS) attacks. (CISA description)
- Vendor / product
- Palo Alto Networks PAN-OS
- CWE
- CWE-940
- CISA required action
- Apply updates per vendor instructions.
- EPSS
- 2.7%, percentile 85 (scored 2026-11-04)
EPSS puts about 2.7 in 100 odds (2.7%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 85% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2022-0028 in the CISA KEV catalogue?
Yes. CISA added CVE-2022-0028 (Palo Alto Networks PAN-OS Reflected Amplification Denial-of-Service Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2022-08-22. CISA's default due date for it is 2022-09-12.
Is CVE-2022-0028 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2022-0028. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2022-0028?
CISA's required action: Apply updates per vendor instructions.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2022-0028