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Researchers from watchTowr and Defused have found evidence that attackers are actively exploiting CVE-2026-3055, a critical NetScaler vulnerability
Researchers have released proof-of-concept (PoC) exploits for a critical Citrix NetScaler vulnerability, tracked as CVE-2025-5777 and dubbed CitrixBleed2, warning that the flaw is easily exploitable and can successfully steal user session tokens. [...]
NetScaler vendor issued a patch but otherwise, stony silence Multiple exploits are circulating for CVE-2025-5777, a critical bug in Citrix NetScaler ADC and NetScaler Gateway dubbed CitrixBleed 2, and security analysts are warning a "significant portion" of users still haven't patched.…
The latest threat to Citrix NetScaler, CVE-2023-4966, was exploited as a zero-day bug for months before a patch was issued. Researchers expect exploitation efforts to surge.
A critical vulnerability tracked as CVE-2023-4966 in Citrix NetScaler ADC/Gateway devices has been actively exploited as a zero-day since late August, security researchers announced. [...]