🛡️ CVE-2026-88771

The items that name it 14

• This is Fine: What NetScaler Zero-Days Tell Us About the New Normal
  articleas classification.key entities2026-10-27
• Beyond the patch: Protecting your NetScaler gateway against future vulnerabilities
  articleas cves2026-10-19
• Citrix Urges Immediate Patching of Critical NetScaler Vulnerability
  advisoryas cves2026-10-09

  NetScaler zero-day leading to remote code execution (RCE), patched a week before CVE-2026-107406, exploited in attacks

• Post-Exploitation Analysis & Artifacts – Citrix NetScaler CVE-2026-88771
  writeupas cves2026-10-07
• CITRIX 0-DAY EXPLOITS: CVE-2026–88771 & CVE-2026–88772 IN THE WILD
  writeupas cves2026-10-06

  Unauthenticated RCE due to improper input validation in Citrix NetScaler ADC/Gateway. Exploited in the wild. Attack chain: crafted requests to endpoints like /nf/auth/doAuthentication.do write malicious strings into NetScaler logs, later processed by ns_monuploadd_err.pl, leading to attacker-control

• Threat Brief: NetScaler Zero Days CVE-2026-88771 and CVE-2026-88772 Exploited in the Wild (Updated September 30)
  advisoryas classification.key entities2026-09-30
• Critical Citrix NetScaler Zero-Days Under Active Exploitation
  advisoryas cves2026-09-29
• Defending Against Active Exploitation of Citrix NetScaler ADC and Gateway Appliances
  writeupas cves2026-09-29It is written here as CVE-2026-88771: second zero-day in NetScaler that vendor disclosures say is actively exploited; DTLS and UDP/443 controls do not mitigate it.
• Oh Look, The Foot Gun Went Off Again (Citrix NetScaler PreAuth Command Injection CVE-2026-88771)
  writeupas cves2026-09-28

  Pre-auth command injection in Citrix NetScaler ADC & Gateway, in the default configuration, exploited in the wild as a zero-day before a fix existed. Root cause: ns_monuploadd_err.pl used unvalidated log data in a grep/sed/awk pipeline whose output was interpolated into a backtick 'find' shell comma

• Zero-Day Exploitation of Citrix NetScaler ADC and Gateway: CVE-2026-88771 and CVE-2026-88772
  advisoryas cves2026-09-28

  Critical remote code execution vulnerability in NetScaler ADC and Gateway, CVSSv4 score 9.5, exploitable in default configuration with low attack complexity, confirmed actively exploited in the wild as a zero-day prior to vendor disclosure on September 27, 2026, added to CISA KEV catalog on Septembe

• watchTowr: CVE-2026-88771 Citrix NetScaler ADC/Gateway unauthenticated RCE
  advisoryas cves2026-09-27

  Improper input validation vulnerability in Citrix NetScaler ADC/Gateway allowing unauthenticated remote attacker to run arbitrary commands; affects every deployment on an affected version, including default configuration; no special feature needs to be enabled; exploited in the wild as a zero-day; a

• Critical FortiMail Zero-Day Flaw (CVE-2026-104286)
  advisoryas cves

  Citrix NetScaler ADC and NetScaler Gateway security flaw under in-the-wild exploitation (details not given).

• Critical Zero-Day Vulnerabilities Exploited in Citrix NetScaler ADC, Gateway
  advisoryas cves
• Known Exploited Vulnerabilities Catalog | CISA
  otheras classification.key entities