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Palo Alto Networks’ firewall bug under attack brings fresh havoc to thousands of companies


Organizations are urged to patch their Palo Alto firewalls after researchers discover evidence of malicious exploitation dating back to late-March.

Because the vulnerability allows hackers to gain complete control of an affected firewall over the internet without authentication, Palo Alto gave the bug a maximum severity rating. This Palo Alto’s zero-day is the latest in a raft of vulnerabilities discovered in recent months targeting corporate security devices — like firewalls, remote access tools and VPN products. These devices sit at the edge of a corporate network and function as digital gatekeepers, but have a propensity to contain severe vulnerabilities that render their security and defenses moot.

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