PAN-OS: Buffer Overflow Vulnerability in Protocol and Service Processing

published 2026-11-11 14h ago modified 2026-11-11 13h ago also EUVD-2026-123796

cvss: 1.7; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: —; no EPSS score yet
public exploits: 0; none known

A buffer overflow vulnerability in Palo Alto Networks PAN-OS software enables an unauthenticated attacker to disrupt service processing by causing a service process crash or memory corruption.

Panorama and Prisma® Access are not affected by this vulnerability.

Patch / fix

fixed in 1

Palo Alto Networks PAN-OS 11.1.16-h5, 11.2.16-h2, 12.1.10-h4, 12.2.4-h2

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CVSS scores

assigned by	version	score	vector
CNA	4.0	1.7	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Amber
CNA	4.0	1.7	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/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:N/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-787 Out-of-bounds Write

Technology feeds

Palo Alto PAN-OS rss critical rss

References

security.paloaltonetworks.com /CVE-2026-0326
vendor-advisory

Sources

CVE List CVE-2026-0326
NVD CVE-2026-0326

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