The Sequels Are Never As Good, But We’re Still In Pain (Citrix NetScaler CVE-2026-3055 Memory Overread)

Sequels? Pain? We’re obviously talking about Citrix NetScalers, yet again.

Welcome back to another watchTowr Labs blog post – pull up a chair, we always welcome new members to our group therapy sessions.

If you asked a C programmer what they most dislike doing in life, their answer might well be:

• Using an IDE,
• Constantly rejecting job offers to work on Citrix NetScalers,
• Wishing they could go back to Assembly, and,
• Writing string processing code.

While C is to some a glorious and beautiful language (as every parent believes their child is the most beautiful), it is (like said children) simply not well-suited for string processing.

Unfortunately, we’re back with another example – in the form of the recently disclosed Citrix NetScaler CVE-2026-3055. Described as a ‘memory overread’ vulnerability, many would’ve read the words and screamed.

Why? Because this sounds suspiciously similar to CitrixBleed and CitrixBleed2, which continue to represent a trauma event for…