Suspected state-sponsored hackers exploited NetScaler zero-day since early September (CVE-2026-88772)

“Advanced and suspected state-sponsored threat actors” are likely to be behind the initial targeted intrusions that leveraged CVE-2026-88772, one of the two recently disclosed NetScaler vulnerabilities that have been exploited as zero-days, says Mandiant CTO Charles Carmakal. Mandiant and Google Threat Intelligence Group (GTIG) know of dozens of impacted organizations across North America and Europe, he added, “including in the government, financial services, education, telecommunications, and l