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RansomwareAug 4, 2026

Prolific ransomware group behind SonicWall zero-day attacks

INC ransomware group actively exploits SonicWall zero-days for data theft and encryption

INC ransomware, a prolific RaaS operation, has emerged as the primary threat actor exploiting a pair of SonicWall zero-days (CVE-2026-15409 and CVE-2026-15410) disclosed in July, effectively chaining both vulnerabilities for full access and extortion. The group has claimed multiple new victims globally across government and private sectors. This follows a pattern of ransomware groups specifically targeting SonicWall products, with 10 of 17 SonicWall CVEs since late 2021 attributed to ransomware campaigns.

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The lesson from this incident

Full lesson

INC ransomware exploited two chained SonicWall zero-day vulnerabilities to gain full access to victim environments across government and private sectors, demonstrating how unpatched network edge devices remain a primary ransomware entry point. The fact that 10 of 17 SonicWall CVEs since late 2021 have been tied to ransomware campaigns reveals a deliberate, sustained targeting strategy against these devices. Zero-day exploitation leaves defenders with little reaction time, making proactive network segmentation and compensating controls critical when patches are unavailable. Organizations relying on perimeter appliances without defense-in-depth strategies are especially exposed when a single device is compromised.

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Indicators of Compromise

Extracted by AI from the linked source. Not reviewed by an editor. How this works

  • cve — CVE-2026-15409
  • cve — CVE-2026-15410
  • malware — INC ransomware

Entities

INC ransomware (threat_actor)SonicWall (vendor)Rapid7 (vendor)Huntress (vendor)CISA (vendor)