Palo Alto Networks PAN-OS GlobalProtect Command Injection Zero-Day
A command-injection vulnerability in the GlobalProtect feature of Palo Alto Networks PAN-OS allows an unauthenticated attacker to execute arbitrary code with root privileges on the firewall. Exploited in the wild as a zero-day before a patch was available.
- Vendor
- Palo Alto Networks
- Product
- PAN-OS (GlobalProtect gateway/portal)
- CVSS
- 10.0
- EPSS (exploit probability)
- 100.0%
- Status
- kevransomware use
- CISA patch-by (BOD 22-01)
- Published
Is CVE-2024-3400 being exploited?
Yes. CISA added CVE-2024-3400 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild. CISA marks it as known to be used in ransomware campaigns.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 100.0% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-11-13. Full cross-catalog view: /kev-comparison
CVE-2024-3400 timeline
- Added to CISA KEVsame day as NVD
- Published to NVD
- First 0dayNews coverage+806d
Every event links to its source. Catalog dates are each catalog's own; day offsets count from NVD publication. Data: JSON
What to do
US federal civilian agencies must remediate by (7 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
CVE-2024-3400 is a maximum-severity command-injection vulnerability in the GlobalProtect feature of Palo Alto Networks’ PAN-OS, the operating system for its next-generation firewalls. Specific PAN-OS versions with GlobalProtect gateway or portal configured, and device telemetry or session ID re-use feature enabled, allowed an unauthenticated attacker to execute arbitrary code with root privileges directly on the firewall.
Palo Alto Networks and Volexity disclosed on April 12, 2024 that the flaw was being exploited in the wild as a zero-day by a threat actor tracked as UTA0218, which deployed a custom Python-based backdoor dubbed UPSTYLE on compromised firewalls to maintain persistent access.
Why it mattered
A root-level remote-code-execution flaw in the firewall itself — the device meant to be the perimeter defense — is about as severe as a network vulnerability gets. CISA added the CVE to its KEV catalog within days, and Palo Alto Networks published both hotfixes and temporary mitigation steps for customers who could not immediately patch.
Full advisory, affected version ranges, and IoCs are published by Palo Alto Networks; the canonical CVE record is linked above via NVD.
Other Palo Alto Networks PAN-OS CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2026-0322 Palo Alto Networks PAN-OS Code Injection Vulnerabilitywrite-up | [ HIGH ] | — | 2.1% | |
| CVE-2026-0257 PAN-OS GlobalProtect authentication bypassransomware usewrite-up | [ CRITICAL ] | 9.1 | 95.6% | |
| CVE-2026-0300 Palo Alto Networks PAN-OS Out-of-bounds Write Vulnerability | [ CRITICAL ] | 9.8 | 41.7% | |
| CVE-2025-0111 Palo Alto Networks PAN-OS File Read Vulnerability | [ MEDIUM ] | 6.5 | 2.0% | |
| CVE-2025-0108 Palo Alto Networks PAN-OS Authentication Bypass Vulnerability | [ CRITICAL ] | 9.1 | 98.5% | |
| CVE-2024-3393 Palo Alto Networks PAN-OS Malicious DNS Packet Vulnerability | [ HIGH ] | 7.5 | 30.2% | |
| CVE-2024-9474 Palo Alto Networks PAN-OS Management Interface OS Command Injection Vulnerabilityransomware use | [ HIGH ] | 7.2 | 93.8% | |
| CVE-2024-0012 Palo Alto Networks PAN-OS Management Interface Authentication Bypass Vulnerabilityransomware use | [ CRITICAL ] | 9.8 | 99.8% |
