CVE-2026-0263
published 2026-05-13CVE-2026-0263: A buffer overflow vulnerability in the IKEv2 processing of Palo Alto Networks PAN-OS® software allows an unauthenticated network-based attacker to execute…
PriorityP264critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.37%
30.4th percentile
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.
Affected
108 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| palo_alto_networks | pan-os | >= 11.1.0 < 11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33 | 11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33 |
| palo_alto_networks | pan-os | >= 11.2.0 < 11.2.12, 11.2.10-h6, 11.2.7-h13, 11.2.4-h17 | 11.2.12, 11.2.10-h6, 11.2.7-h13, 11.2.4-h17 |
| palo_alto_networks | pan-os | >= 12.1.0 < 12.1.7, 12.1.4-h5 | 12.1.7, 12.1.4-h5 |
| paloalto | cloud_ngfw | — | — |
| paloalto | pan-os | — | — |
| paloalto | prisma_access | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
| paloaltonetworks | pan-os | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- →The vulnerability exists in IKEv2 processing on PAN-OS firewalls; monitor for anomalous or malformed IKEv2 traffic (UDP port 500/4500) targeting PAN-OS devices, which may indicate exploitation attempts causing buffer overflow, RCE, or DoS. ↗
- →Panorama, Cloud NGFW, and Prisma Access are confirmed NOT affected; focus detection and patching efforts exclusively on PAN-OS firewall appliances running affected versions. ↗
- ·Customers using IKEv2 VPN can apply a workaround by restricting IKEv2 VPN tunnels to NIST-approved Post Quantum Cryptography (PQC) ciphers only, which mitigates the vulnerability without patching. ↗
- ·Affected PAN-OS versions span multiple branches (11.1, 11.2, 12.1); ensure version-specific hotfix or upgrade targets are applied per the vendor matrix (e.g., 12.1.7+, 11.2.12+, 11.1.15+). ↗
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv4.07.2HIGHCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/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:C/RE:H/U:Red
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Palo Alto
PAN-OS: Remote Code Execution (RCE) in IKEv2 Processing
vendor_paloalto·CVSS 7.2
CVE-2026-0263 [HIGH] CWE-787 PAN-OS: Remote Code Execution (RCE) in IKEv2 Processing
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.
Affected products: Cloud NGFW, PAN-OS, Prisma Access
Solution: VERSION MINOR VERSION SUGGESTED SOLUTION
Cloud NGFW No action needed.
PAN-OS 12.1 12.1.5 through 12.1.6 Upgrade to 12.1.7 or later.
12.1.2 through 12.1.4-h* Upgrade to 12.1.4-h5 or 12.1.7 or later.
PAN-OS 11.2 11.2.11 or later Upgrade to 11.2.12 or later.
11.2.8 through 11.2.10-h* Upgrade to 11.2.10-h6 or 11.2.12 or later.
11.2.5 th
GHSA
GHSA-xqxf-q4xj-jxh3: A buffer overflow vulnerability in the IKEv2 processing of Palo Alto Networks PAN-OS® software allows an unauthenticated network-based attacker to exe
ghsa_unreviewed·2026-05-13
CVE-2026-0263 [HIGH] CWE-787 GHSA-xqxf-q4xj-jxh3: A buffer overflow vulnerability in the IKEv2 processing of Palo Alto Networks PAN-OS® software allows an unauthenticated network-based attacker to exe
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.
VulDB
Palo Alto Cloud NGFW/PAN-OS/Prisma Access IKEv2 out-of-bounds write (EUVD-2026-30064)
vuldb·2026-05-13·CVSS 7.2
CVE-2026-0263 [HIGH] Palo Alto Cloud NGFW/PAN-OS/Prisma Access IKEv2 out-of-bounds write (EUVD-2026-30064)
A vulnerability identified as critical has been detected in Palo Alto Cloud NGFW, PAN-OS and Prisma Access. Affected is an unknown function of the component IKEv2 Handler. The manipulation leads to out-of-bounds write.
This vulnerability is traded as CVE-2026-0263. It is possible to initiate the attack remotely. There is no exploit available.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-05-13
Published