Vulnerability · Published Feb 11, 2026 · Assigned by palo_alto

CVE-2026-0229PAN-OS: Denial of Service in Advanced DNS Security Feature

Medium 6.6

In plain English

A medium-severity security flaw in Cloud NGFW from Palo Alto Networks. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 48% of all known vulnerabilities).

Severity (CVSS 4.0)6.6Medium

Exploit odds (30 days)0.6%top 52.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A denial-of-service (DoS) vulnerability in the Advanced DNS Security (ADNS) feature of Palo Alto Networks PAN-OS® software enables an unauthenticated attacker to initiate system reboots using a maliciously crafted packet. Repeated attempts to initiate a reboot causes the firewall to enter maintenance mode. Cloud NGFW and Prisma Access® are not impacted by this vulnerability.

Affected products (as reported)

Vendor	Product	Versions
Palo Alto Networks	Cloud NGFW	see references
Palo Alto Networks	PAN-OS	12.1.0 – before 12.1.411.2.0 – before 11.2.10
Palo Alto Networks	Prisma Access	see references

Weakness: CWE-754 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/AU:Y/R:U/V:D/RE:M/U:Amber

References

https://security.paloaltonetworks.com/CVE-2026-0229 vendor-advisory