CISA has added one new vulnerability to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risk to the federal enterprise.

️ CVE-2026-0300 (https://secdb.nttzen.cloud/cve/detail/CVE-2026-0300)
- Name: Palo Alto Networks PAN-OS Out-of-bounds Write Vulnerability
- Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Until the vendor releases an official fix, the following workaround should be implemented: - Restrict User-ID Authentication Portal access to only trusted zones. - Disable User-ID Authentication Portal if not required.
- Known To Be Used in Ransomware Campaigns? Unknown
- Vendor: Palo Alto Networks
- Product: PAN-OS
- Notes: https://security.paloaltonetworks.com/CVE-2026-0300 ; https://nvd.nist.gov/vuln/detail/CVE-2026-0300

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