Denial of service in Palo Alto PAN-OS

Published: 2021-09-08
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-3053
Exploitation vector Network
Public exploit N/A
Vulnerable software
Palo Alto PAN-OS
Operating systems & Components / Operating system

Vendor Palo Alto Networks, Inc.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper Handling of Exceptional Conditions

EUVDB-ID: #VU56408

Risk: Medium


CVE-ID: CVE-2021-3053

CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions

Exploit availability: No


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper handling of exceptional conditions in the Palo Alto Networks PAN-OS dataplane. A remote attacker can send specifically crafted traffic through the firewall and perform a denial of service attack.


Install updates from vendor's website.

Vulnerable software versions

Palo Alto PAN-OS: 9.1 - 9.1.8, 9.0 - 9.0.13, 10.0.0 - 10.0.4, 8.1 - 8.1.19

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?