CVE-2024-3393: Palo Alto Networks PAN-OS Malicious DNS Packet Vulnerability
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Palo Alto Networks PAN-OS contains a vulnerability in parsing and logging malicious DNS packets in the DNS Security feature that, when exploited, allows an unauthenticated attacker to remotely reboot the firewall. Repeated attempts to trigger this condition will cause the firewall to enter maintenance mode.
CSIRTS triage
- What
- Palo Alto Networks PAN-OS contains a vulnerability in parsing and logging malicious DNS packets that can allow an unauthenticated attacker to remotely reboot the firewall.
- Who is affected
- Deployments of Palo Alto Networks PAN-OS firewalls.
- Urgency
- Remediation is urgent due to active exploitation and critical severity.
- Action
- Apply the security updates provided by Palo Alto Networks.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch PAN-OS
Get an email when a new PAN-OS advisory drops — max one per day, one-click unsubscribe.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2024-3393
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2024-3393Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 98% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2024-3393 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Palo Alto Networks
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- high[NEW] [high] Palo Alto Networks PAN-OS: Multiple vulnerabilitiescert-bund · 2026-07-10
- medium[NEW] [medium] Palo Alto Networks Cortex XDR Broker VM: Vulnerability allows privilege escalationcert-bund · 2026-07-10
- unknownCVE-2026-0276: A privilege escalation vulnerability in Palo Alto Networks Cortex® XDR Broker VM enables a loca…nvd · 2026-07-09
- unknownCVE-2026-0275: A local privilege escalation vulnerability in Palo Alto Networks Prisma® Browser allows a local…nvd · 2026-07-09
- unknownCVE-2026-0287: Multiple denial of service vulnerabilities in Palo Alto Networks PAN-OS® software allow an unau…nvd · 2026-07-09
- unknownCVE-2026-0286: A command injection vulnerability in the management plane of Palo Alto Networks PAN-OS® softwar…nvd · 2026-07-09
More from CISA Known Exploited Vulnerabilities
- criticalCVE-2026-48939: iCagenda Unrestricted Upload of File with Dangerous Type Vulnerability2026-07-10
- criticalCVE-2026-56291: Balbooa Forms Unrestricted Upload of File with Dangerous Type Vulnerability2026-07-10
- criticalCVE-2026-48908: JoomShaper SP Page Builder Unrestricted Upload of File with Dangerous Type Vulnerability2026-07-07
- criticalCVE-2026-55255: Langflow Authorization Bypass Through User-Controlled Key Vulnerability2026-07-07
- criticalCVE-2026-48282: Adobe ColdFusion Path Traversal Vulnerability2026-07-07