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GreyNoise observed an increase in scanning and exploitation attempts against Digital Video Recorders (DVRs) in Ukraine between 21 September and 1 October 2026, coinciding with an escalation in Russian strikes. Most of the activity targeted CVE-2021-36260, an unauthenticated command injection flaw in unpatched Hikvision products. GreyNoise…
Between May 9 and May 18, 2026, GreyNoise observed a major spike in scanning of SonicWall SonicOS management interfaces. The May 12 peak of about 597,000 sessions was the largest single-day total on the SonicWall SonicOS API Scanner tag in 90 days, roughly 46x the typical daily volume. Earlier spikes on this tag (January 18, January 30 an…
GreyNoise reports that a single malicious cyber actor, tracked since 7 May 2026, is a suspected Chinese speaker working in UTC+8 and is the same as or related to Red Heron (reported by Acronis), based on the shared C2 domain, malware family, Gitea exploitation and other TTPs. The actor exploited the wp2shell WordPress chain (CVE-2026-6303…
