Status: KEV | Advisory ID: CVE-2026-0300
| CVE | CVE-2026-0300 |
| Affected products | Siemens RUGGEDCOM APE1808 Firmware and Palo Alto Networks PAN-OS |
| Exploitation status | Listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating confirmed active exploitation. |
| Classified as | CWE-787 (Out-of-bounds Write) |
| KEV listing | Added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-05-06. |
| Exploitation prediction (EPSS) | 32% probability of exploitation in the next 30 days (98% percentile) -- FIRST.org's EPSS model. |
| Federal remediation deadline | 2026-05-09 (CISA KEV, Binding Operational Directive). |
Palo Alto Networks PAN-OS contains an out-of-bounds write vulnerability in the User-ID Authentication Portal (aka Captive Portal) service that can allow an unauthenticated attacker to execute arbitrary code with root privileges on the PA-Series and VM-Series firewalls by sending specially crafted packets.
| Source | Reference |
|---|---|
| NVD | https://nvd.nist.gov/vuln/detail/CVE-2026-0300 |