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cve recordcriticalexploited in the wild3 of 3 cataloguesexploit reported

CVE-2026-3055

Citrix · NetScaler · Citrix NetScaler Out-of-Bounds Read Vulnerability

Published · Added to CISA KEV
CVSS9.8
Severitycritical
WeaknessCWE-125
EPSS4.0%90.6th percentile
Exploited3 KEV sources
Ransomware useUnknown
Federal fix dueApr 2, 2026

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

patch window

Called exploited 6 days after disclosure.

Measured from the CVE publication date to the earliest of 3 KEV catalogues that list it.

The life of this vulnerability

  1. CVE published
  2. First KEV listing6d
  3. Last KEV listing1d
  4. Last sighting5mo

Gaps are compressed to equal steps. The elapsed time is printed under each.

Which catalogues call it exploited

Sources3 of 3
Listings differ by1 d
Strongest claimconfirmed

3 catalogues list it. CIRCL aggregates the others and is shown but not counted.

Public exploitation evidence

181 public reports collected from VulnCheck and CIRCL, first on Mar 29, 2026. Each links to its original source. We have not verified them.

Description

Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread

Required action (CISA)

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

References

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Our coverage of CVE-2026-3055

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CVE-2026-33017high

Chinese Hacker Uses DeepSeek AI to Orchestrate Vulnerability Exploits

A Chinese threat actor has reportedly leveraged large language models (LLMs), including DeepSeek AI's Hermes Agent, to automate and accelerate vulnerability exploitation campaigns against internet-exposed infrastructure in Asia. The actor, known by the aliases 'knaithe' and 'KnYuan' and believed to be based in Zhuhai, China, is described as an opportunistic exploit operator and binary security…