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PatchSiren cyber security CVE debrief

CVE-2022-0028 Palo Alto Networks CVE debrief

CVE-2022-0028 is a Palo Alto Networks PAN-OS reflected amplification denial-of-service vulnerability. CISA listed it in the Known Exploited Vulnerabilities catalog on 2022-08-22, which signals that it was considered actively exploited or otherwise confirmed as a priority risk for defenders. The supplied record does not include a CVSS score or version-specific scope, so the safest response is to treat exposed PAN-OS deployments as needing prompt vendor-directed remediation.

Vendor
Palo Alto Networks
Product
PAN-OS
CVSS
HIGH 8.6
CISA KEV
Listed
Original CVE published
2022-08-22
Original CVE updated
2022-08-22
Advisory published
2022-08-22
Advisory updated
2022-08-22

Who should care

Organizations running Palo Alto Networks PAN-OS, especially teams responsible for perimeter security devices, internet-exposed management interfaces, and incident response. Any environment that depends on PAN-OS for firewalling or network segmentation should treat this as a priority availability risk.

Technical summary

The public record identifies the issue as a reflected amplification denial-of-service vulnerability in PAN-OS. That means an attacker can leverage network traffic behavior to increase the impact of requests in a way that can disrupt service availability. The source corpus here does not provide affected versions, attack preconditions, or a CVSS rating, so the defensible takeaway is limited to the vulnerability class and its inclusion in CISA KEV.

Defensive priority

High. CISA KEV inclusion is a strong indicator that defenders should prioritize remediation over routine patch queues, particularly for externally reachable PAN-OS assets. The due date in the KEV record was 2022-09-12, so unremediated systems should be considered overdue for action.

Recommended defensive actions

  • Apply Palo Alto Networks updates and follow vendor remediation guidance for CVE-2022-0028.
  • Inventory all PAN-OS deployments and identify any devices exposed to untrusted networks.
  • Prioritize remediation on perimeter and internet-facing appliances before lower-risk internal assets.
  • Verify remediation status after patching and confirm the device is running a fixed release.
  • Monitor Palo Alto Networks and CISA guidance for any additional mitigation or verification steps.

Evidence notes

This debrief is based on the supplied CISA KEV source item and the official record links provided in the corpus. The KEV entry names the issue as a reflected amplification denial-of-service vulnerability in Palo Alto Networks PAN-OS and records dateAdded 2022-08-22 with dueDate 2022-09-12. The corpus does not include affected versions, exploit mechanics beyond the vulnerability class, or a CVSS score, so no additional technical claims are made.

Sources and references

Verified primary and authoritative sources

  • CVE-2022-0028 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2022-0028

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2022-0028 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2022-0028

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.