Palo Alto Networks PAN-OS and Prisma Browser Vulnerabilities Disclosed
Palo Alto Networks disclosed a denial-of-service (DoS) vulnerability, identified as CVE-2025-4619, affecting PAN-OS software on PA-Series, VM-Series, CN-Series firewalls, and Prisma Access. This vulnerability allows an unauthenticated attacker to reboot a firewall by sending specially crafted packets through the data plane, potentially causing the device to enter maintenance mode if exploited repeatedly. The company has detailed affected and unaffected PAN-OS versions and confirmed that Cloud NGFW is not impacted. Prisma Access customers have largely been upgraded, with remaining updates scheduled.
Additionally, Palo Alto Networks released its November 2025 monthly vulnerability update for Chromium and Prisma Browser, addressing multiple CVEs, including several Chromium vulnerabilities and three specific to Prisma Browser (CVE-2025-4616, CVE-2025-4617, CVE-2025-4618). The Canadian Centre for Cyber Security issued an advisory summarizing these disclosures and urging administrators to review the advisories, apply mitigations, and update affected products to secure their environments against these vulnerabilities.
Timeline
Nov 12, 2025
Canadian Centre for Cyber Security republishes Palo Alto advisory notice
The Canadian Centre for Cyber Security published alert AV25-748 referencing a Palo Alto Networks security advisory. This reflects government-side dissemination of Palo Alto's November 12, 2025 security advisory information.
Nov 12, 2025
Palo Alto Networks issues November 2025 Chromium and Prisma Browser update
Palo Alto Networks released advisory PAN-SA-2025-0018 covering the November 2025 monthly vulnerability update for Chromium and Prisma Browser. The publication indicates security fixes or vulnerability information for those products were made available on November 12, 2025.
Nov 12, 2025
Palo Alto Networks discloses CVE-2025-4619 PAN-OS DoS vulnerability
Palo Alto Networks published a security advisory for CVE-2025-4619 describing a PAN-OS firewall denial-of-service condition triggered by specially crafted packets. The advisory publicly documented the vulnerability on November 12, 2025.
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