Vulnerabilities Thousands of Citrix NetScaler Instances Unpatched Against Exploited Vulnerabilities Many Citrix NetScaler systems are exposed to attacks exploiting the vulnerabilities tracked as CVE-2025-5777 and CVE-2025-6543. Ionut ArghireJuly 1, 2025
Vulnerabilities Evidence Suggests Exploitation of CitrixBleed 2 Vulnerability The Citrix NetScaler vulnerability tracked as CitrixBleed 2 and CVE-2025–5777 may be exploited in the wild for initial access. Eduard KovacsJune 27, 2025
Vulnerabilities Critical Citrix NetScaler Flaw Exploited as Zero-Day Citrix has released patches for a critical vulnerability in NetScaler ADC and NetScaler Gateway exploited as a zero-day. Ionut ArghireJune 26, 2025
Vulnerabilities Critical Vulnerability Patched in Citrix NetScaler Citrix has released patches for critical- and high-severity vulnerabilities in NetScaler and Secure Access Client and Workspace for Windows. Ionut ArghireJune 18, 2025
Network Security Citrix Warns of Password Spraying Attacks Targeting NetScaler Appliances Citrix issues warning on password spraying attacks targeting NetScaler and NetScaler Gateway appliances deployed by organizations worldwide. Ionut ArghireDecember 16, 2024
Vulnerabilities Exploitation Attempts Target Citrix Session Recording Vulnerabilities Exploitation attempts seen for two recently patched Citrix Session Recording vulnerabilities tracked as CVE-2024-8068 and CVE-2024-8069. Eduard KovacsNovember 21, 2024
Malware & Threats Citrix, Cisco, Fortinet Zero-Days Among 2023’s Most Exploited Vulnerabilities Most of the top frequently exploited vulnerabilities in 2023 were initially exploited as zero-days, according to data from government agencies. Ionut ArghireNovember 13, 2024
Vulnerabilities Citrix, Fortinet Patch High-Severity Vulnerabilities Citrix and Fortinet have released patches for multiple vulnerabilities, including high-severity bugs in NetScaler and FortiOS. Ionut ArghireNovember 13, 2024
Cloud Security Citrix Patches Critical NetScaler Console Vulnerability Citrix rolls out patches for multiple security vulnerabilities, including critical and high-severity issues in the NetScaler product line. Ionut ArghireJuly 10, 2024
Vulnerabilities Citrix Warns NetScaler ADC Customers of New Zero-Day Exploitation Citrix is aware of attacks exploiting two new NetScaler ADC and Gateway zero-day vulnerabilities tracked as CVE-2023-6548 and CVE-2023-6549. Eduard KovacsJanuary 17, 2024
Vulnerabilities Citrix, Gov Agencies Issue Fresh Warnings on CitrixBleed Vulnerability Administrators are urged to patch the recent CitrixBleed NetScaler vulnerability as LockBit starts exploiting it. Ionut ArghireNovember 22, 2023
Vulnerabilities CitrixBleed Vulnerability Exploitation Suspected in Toyota Ransomware Attack Toyota Financial Services has been hit by a ransomware attack that may have involved exploitation of the CitrixBleed vulnerability. Eduard KovacsNovember 17, 2023
Malware & Threats Mass Exploitation of ‘Citrix Bleed’ Vulnerability Underway Multiple threat actors are exploiting CVE-2023-4966, aka Citrix Bleed, a critical vulnerability in NetScaler ADC and Gateway. Ionut ArghireNovember 1, 2023
Vulnerabilities Recent NetScaler Vulnerability Exploited as Zero-Day Since August Mandiant says the recently patched Citrix NetScaler vulnerability CVE-2023-4966 had been exploited as zero-day since August. Ionut ArghireOctober 18, 2023
Vulnerabilities Exploitation of Citrix ShareFile Vulnerability Spikes as CISA Issues Warning Exploitation of a Citrix ShareFile vulnerability tracked as CVE-2023-24489 has spiked as CISA added it to its ‘must patch’ catalog. Eduard KovacsAugust 17, 2023
Vulnerabilities Over 20,000 Citrix Appliances Vulnerable to New Exploit Over 20,000 appliances are vulnerable to a new exploit technique targeting a recent Citrix ADC zero-day vulnerability CVE-2023-3519. Ionut ArghireJuly 24, 2023
Vulnerabilities Citrix Zero-Day Exploited Against Critical Infrastructure Organization CISA says the new Citrix zero day vulnerability tracked as CVE-2023-3519 has been exploited against a critical infrastructure organization. Eduard KovacsJuly 21, 2023
Vulnerabilities Exploitation of New Citrix Zero-Day Likely to Increase, Organizations Warned Citrix has patched several vulnerabilities, including CVE-2023-3519, a critical remote code execution zero-day that has been exploited in attacks. Eduard KovacsJuly 19, 2023
Vulnerabilities Citrix Patches High-Severity Vulnerabilities in Windows, Linux Apps Citrix released patches for multiple vulnerabilities in Virtual Apps and Desktops, and Workspace apps for Windows and Linux. Ionut ArghireFebruary 15, 2023