Critical

Citrix patches NetScaler SAML zero-day exploited in attacks

BleepingComputer

October 4, 2026 at 9:58 PM

Actively Exploited

Overview

Citrix has issued urgent updates to address a denial-of-service vulnerability in its NetScaler product, identified as CVE-2026-88779. This flaw has already been exploited in zero-day attacks, raising concerns about its potential for remote code execution as well. The vulnerability affects users of Citrix’s NetScaler, which is widely used for application delivery and load balancing. Companies using this system should prioritize applying the latest patches to protect their environments. The fast-tracked response from Citrix indicates the seriousness of the threat, as attackers are actively exploiting this vulnerability in the wild.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: Citrix NetScaler
Action Required: Emergency updates have been released.
Timeline: Newly disclosed

Original Article Summary

Citrix has released emergency updates for a new NetScaler denial-of-service vulnerability tracked as CVE-2026-88779 that has been exploited in zero-day attacks, with researchers investigating whether it can also be exploited for remote code execution. [...]

Impact

Citrix NetScaler

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Newly disclosed

Remediation

Emergency updates have been released. Users should apply the latest patches provided by Citrix for CVE-2026-88779.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to CVE, Zero-day, Vulnerability.

Read Original Article

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