Pan-OS IKEv2 Buffer Overflow Enables RCE
CVE-2026-0263 Published on May 13, 2026
PAN-OS: Remote Code Execution (RCE) in IKEv2 Processing
A buffer overflow vulnerability in the IKEv2 processing of Palo Alto Networks PAN-OS® software allows an unauthenticated network-based attacker to execute arbitrary code with elevated privileges on the firewall, or cause a denial of service (DoS) condition.
Panorama, Cloud NGFW, and Prisma® Access are not impacted by these vulnerabilities.
Vulnerability Analysis
CVE-2026-0263 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Timeline
Initial publication.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2026-0263 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2026-0263
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Affected Versions
Palo Alto Networks Cloud NGFW:- Version All is unaffected.
- Version 12.1.0 and below 12.1.7, 12.1.4-h5 is affected.
- Version 11.2.0 and below 11.2.12, 11.2.10-h6, 11.2.7-h13, 11.2.4-h17 is affected.
- Version 11.1.0 and below 11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33 is affected.
- Version 10.2.0 is unaffected.
- Version All is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.