CVE-2026-3055—Citrix NetScaler Out-of-Bounds Read Vulnerability

Vulnerability Name

Citrix NetScaler Out-of-Bounds Read Vulnerability

Description

Citrix NetScaler ADC (formerly Citrix ADC), NetScaler Gateway (formerly Citrix Gateway) and NetScaler ADC FIPS and NDcPP contain an out-of-bounds reads vulnerability when configured as a SAML IDP leading to memory overread.

Known To Be Used in Ransomware Campaigns?

Ransomware Status:

Unknown

Action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Additional Notes

• https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696300&articleURL=NetScaler_ADC_and_NetScaler_Gateway_Security_Bulletin_for_CVE_2026_3055_and_CVE_2026_4368
• https://nvd.nist.gov/vuln/detail/CVE-2026-3055

Related News Articles

• CISA Flags Langflow RCE, Tomcat, and N-central Flaws as Actively ExploitedAugust 5, 2026
• Chinese hacker used DeepSeek to launch autonomous cyberattacks on vulnerable serversAugust 3, 2026
• Hacker uses DeepSeek AI to autonomously attack vulnerable serversJuly 31, 2026
• Chinese Hacker Commands DeepSeek via Telegram to Launch Autonomous AttacksJuly 31, 2026
• CISA orders feds to patch actively exploited Citrix flaw by ThursdayMarch 31, 2026

Related Weaknesses

• CWE-125