Critical SonicWall SMA 1000 Flaw Targeted in 135 Exploitation Attempts After Patch
AI-summarised brief · reviewed before publication
Threat actors began exploiting a critical pre‑authenticated SSRF flaw in SonicWall Secure Mobile Access (SMA) 1000 appliances within days of its public disclosure. The vulnerability, CVE‑2026‑102255, carries a CVSS score of 10.0 and allows remote attackers to force the appliance to issue arbitrary internal requests, potentially compromising internal services and extracting credentials. SonicWall issued patches on October 6, 2026 (versions 12.4.3‑03670 and 12.5.0‑03082), but exploitation was detected by Defused Cyber and Previdian on October 8, with 135 attempts traced to two U.S. IP addresses. This is the latest in a series of high‑severity flaws targeting the SMA 1000, following June zero‑day attacks that enabled credential theft, MFA seed harvesting, and lateral movement into corporate networks.
💡 Why It Matters
- · The rapid weaponisation of a flawless‑rated SSRF demonstrates that even patched devices can be compromised almost immediately, forcing organizations to reassess patch‑to‑protect timelines and monitoring of legacy security appliances.