Check Point says hackers used firewall zero-day CVE-2026-123039 to wipe data at Israeli organizations
Check Point said on November 12, 2026, that attackers exploited CVE-2026-123039, a previously unknown flaw in its security gateways, against a couple of dozen customers. The attackers broke in through the PHP2Shell flaws, used CVE-2026-123039 to gain root control, and in a first wave that began October 30 ran a wiper, malware that deletes data, against some Israeli organizations. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added the flaw to its catalog of exploited vulnerabilities on November 13 and gave federal civilian agencies until November 16 to address it.