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initial_access_vector:exploit_public_facing × criticity:critical × cves:CVE-2026-7273 × limpar

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cisa.gov · critical

CISA adds Zyxel GS1900 switch stack-based buffer overflow CVE-2026-7273 to KEV catalog on evidence of active exploitation

CISA added one vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog on 2026-09-21 based on evidence of active exploitation: CVE-2026-7273, a stack-based buffer overflow in Zyxel GS1900 Series Switches. CISA describes this vulnerability type as a frequent attack vector for malicious cyber actors and a significant risk to the …

CVE-2026-7273 government
greynoise.io · critical

Chinese-speaking actor tied to Red Heron exploits WordPress wp2shell, ZyXEL GS1900 CVE-2026-7273 and Ubiquiti; steals 18,000+ government records

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…

CVE-2026-7273 CVE-2026-34908 CVE-2026-34909 Red Heron government law enforcement