CVE-2026-0310 PAN-OS: Buffer Overflow Vulnerability via XML Processing
Unauthenticated attackers can cause denial of service or execute arbitrary code with root privileges via XML processing flaws in PAN-OS firewalls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-0310?
CVE-2026-0310 is a high-severity memory corruption vulnerability in Palo Alto Networks Cloud NGFW, published on 10 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A buffer overflow vulnerability in the XML processing functionality of Palo Alto Networks PAN-OS® software enables an unauthenticated attacker with network access to the management web or dataplane interface to cause a denial of service (DoS) condition on VM-Series firewalls or execute arbitrary code with root privileges on the PA-Series firewalls.
The security risk posed by this issue is minimized when the management interface is restricted to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 .
Panorama is impacted by this vulnerability.
Weakness: CWE-787
Which versions are affected by CVE-2026-0310?
How do I fix CVE-2026-0310?
No fix has been published for CVE-2026-0310 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-0310 being exploited?
There is no known exploitation of CVE-2026-0310 in the wild and no public exploit code.
Sources
Also known as GHSA-hwvp-gh82-wq29.