UTA0533

Volexity discovered threat actor UTA0533 exploiting two zero-day vulnerabilities in SonicWall SMA 1000 series VPN appliances to achieve root-level remote code execution. CVE-2026-15409 enables pre-auth SSRF via /wsproxy to tunnel to localhost services, while CVE-2026-15410 enables command injection via path traversal in the sysCtrl.execRemoveHotfix endpoint. The actor deployed custom malware including KNUCKLEBALL (Java agent injector), ORANGETAIL (webshell), and ROOTRUN (privilege escalation binary), then used tcpdump to capture LDAP credentials and attempted lateral movement from over 200 IP addresses.