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

published 2026-02-11 8 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-5938

cvss: 6.6; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

Palo Alto Networks PAN-OS 10.2.17, 11.1.11, 11.2.10, 12.1.4

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-25-162-02 updated 2026-03-12 cvss 7.5

Siemens RUGGEDCOM APE1808

Siemens RUGGEDCOM APE1808
affected: vendor fix

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 8 mo ago (2026-02-11)

Exploit prediction

0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	6.6	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
CNA	4.0	6.6	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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:D/RE:M/U:Amber

Affected products

Palo Alto Networks Cloud NGFW
Palo Alto Networks PAN-OS
Palo Alto Networks Prisma Access

Classification

Weakness

CWE-754 Improper Check for Unusual or Exceptional Conditions

Technology feeds

Palo Alto PAN-OS rss critical rss

References

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

Sources

CVE List CVE-2026-0229
NVD CVE-2026-0229

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary