What it is
CVE-2024-3393 is an unauthenticated vulnerability affecting Palo Alto Networks Cloud NGFW, PAN-OS. A Denial of Service vulnerability in the DNS Security feature of Palo Alto Networks PAN-OS software allows an...
Vulnerability report
Exploited in the wild
Confirmed confidence
In CISA KEV
CVE-2024-3393
Cloud NGFW Denial of Service
Palo Alto Networks / Cloud NGFW · All
- Severity
- CVSS 8.7 · High
- Confidence
- Confirmed
- Exploit status
- Exploited in the wild
- EPSS
- 28.6%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.
Who is affected?
Palo Alto Networks / Cloud NGFW all.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
Cloud NGFW Denial of Service
A Denial of Service vulnerability in the DNS Security feature of Palo Alto Networks PAN-OS software allows an unauthenticated attacker to send a malicious packet through the data plane of the firewall that reboots the firewall.
Repeated attempts to trigger this condition will cause the firewall to enter maintenance mode.
Vendor
Product
Affected
Status
Palo Alto Networks
Cloud NGFW
All
Unaffected
Palo Alto Networks
PAN-OS
Before 11.2.3
Affected
Palo Alto Networks
PAN-OS
Before 11.1.2-h16
Affected
Palo Alto Networks
PAN-OS
Before 10.2.8-h19
Affected
Palo Alto Networks
PAN-OS
Before 10.1.14-h8
Affected
Palo Alto Networks
PAN-OS
Before 10.2.8
Unaffected
Palo Alto Networks
PAN-OS
Before 11.2.3
Affected
- Published
- 27 Dec 2024
- Exploitation Reported
- 30 Dec 2024
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- None
- User interaction
- None
Tags
edge
cisa
nessus_scanner
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2024-3393
- Vendor Advisory — security.paloaltonetworks.com security.paloaltonetworks.com · Vendor Advisory https://security.paloaltonetworks.com/CVE-2024-3393
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
CISA
Independent exploitation attestation added to the KEV Intelligence record.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CISA First | 2024-12-30 00:00 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
Nessus template detected 02 Jun 2025.
View Nessus template (opens in new tab)Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →Scanner Artifacts
Scanner and exploit-framework references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Nessus | https://www.tenable.com/plugins/nessus/213409 | 02 Jun 2025 |
Risk and context
Severity, weaknesses, and research context
CVSS v4.0
8.7
High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:N/R:U/V:C/RE:M/U:Amber
EPSS
28.6%
Timeline
From disclosure to observed exploitation
-
Nessus plugin available
Scanner coverage available
-
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
CVE published
Vulnerability disclosed publicly
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2024-3393
Free JSON includes basic KEV fields{
"cve_id": "CVE-2024-3393",
"confidence": "Confirmed",
"cvss_score": 8.7,
"cvss_estimated": false,
"epss_score": 0.28617,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
Receive curator-selected alerts when exploitation activity warrants attention. Each alert includes the evidence and context needed to decide what requires attention now.