⚡ Weekly Recap: Telecom Sleeper Cells, LLM Jailbreaks, Apple Forces U.K. Age Checks and More

Some weeks are loud. This one was quieter but not in a good way. Long-running operations are finally hitting courtrooms, old attack methods are showing up in new places, and research that stopped being theoretical right around the time defenders stopped paying attention. There's a bit of everythi...

CISA Adds One Known Exploited Vulnerability to Catalog

CISA has added one new vulnerability to its Known Exploited Vulnerabilities KEV Catalog, based on evidence of active exploitation. CVE-2026-3055link is external Citrix NetScaler Out-of-Bounds Read Vulnerability This type of vulnerability is a frequent attack vector for malicious cyber actors and...

Citrix NetScaler Out-of-Bounds Read Vulnerability

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...

Citrix NetScaler Under Active Recon for CVE-2026-3055 (CVSS 9.3) Memory Overread Bug

A recently disclosed critical security flaw impacting Citrix NetScaler ADC and NetScaler Gateway is witnessing active reconnaissance activity, according to Defused Cyber and watchTowr. The vulnerability, CVE-2026-3055 CVSS score: 9.3, refers to a case of insufficient input validation leading to...

Citrix Urges Patching Critical NetScaler Flaw Allowing Unauthenticated Data Leaks

Citrix has released security updates to address two vulnerabilities in NetScaler ADC and NetScaler Gateway, including a critical flaw that could be exploited to leak sensitive data from the application. The vulnerabilities are listed below - CVE-2026-3055 CVSS score: 9.3 - Insufficient input...

PT-2026-27202

Name of the Vulnerable Software and Affected Versions NetScaler ADC versions prior to 14.1-60.58 NetScaler Gateway versions prior to 13.1-662.23 Description Insufficient input validation in the SAML processing module of NetScaler ADC and NetScaler Gateway, when configured as a SAML Identity...

Citrix ADC (NetScaler) CVE-2026-3055 Scanner

This module scans for a vulnerability that allows a remote, unauthenticated attacker to leak memory from a target Citrix ADC server configured as a SAML IdP. The leaked memory is then scanned for session cookies which can be hijacked if found. Module Options msf use...

PT-2026-27122

Name of the Vulnerable Software and Affected Versions NetScaler ADC affected versions not specified NetScaler Gateway affected versions not specified NetScaler Gateway version 14.1-66.54 Description A race condition occurs in NetScaler ADC and NetScaler Gateway when the appliance is configured as...

Citrix NetScaler ADC和Citrix NetScaler Gateway 安全漏洞

Citrix NetScaler ADC and Citrix NetScaler Gateway are both products of the American company Citrix. Citrix NetScaler ADC is an application delivery and security platform. Citrix NetScaler Gateway is a solution for secure remote access. Both Citrix NetScaler ADC and Citrix NetScaler Gateway have...

Citrix NetScaler ADC和Citrix NetScaler Gateway 安全漏洞

Citrix NetScaler ADC and Citrix NetScaler Gateway are both products of the American company Citrix. Citrix NetScaler ADC is an application delivery and security platform. Citrix NetScaler Gateway is a solution for secure remote access. Both Citrix NetScaler ADC and Citrix NetScaler Gateway have...

Citrix Receiver App for Windows Remote Code Execution Vulnerability (CTX251986)

The version of Citrix Receiver installed on the remote host is affected by a remote code execution vulnerability due to incorrect access control. An unauthenticated, remote attacker can exploit this to bypass authentication and execute arbitrary commands on the remote host. %NASLMINLEVEL 80900 C...

PT-2026-5910

GreyNoise сообщает о детектировании скоординированной разведывательной кампании, нацеленной на инфраструктуру Citrix NetScaler, в которой задействовались десятки тысяч резидентных прокси-серверов для выявления панелей авторизации. Активность наблюдалась в период с 28 января по 2 февраля и также...

PT-2026-6087

Name of the Vulnerable Software and Affected Versions Citrix Emergency Sharing versions prior to SMR Feb-2026 Release 1 Description An improper access control issue exists in Emergency Sharing. This allows local attackers to interrupt the functionality of the service. Recommendations Update to SM...

📄 NetScaler 14.1 Vulnerability Scanner

This Metasploit module scans for vulnerable Citrix NetScaler ADC instances affected by the memory overflow noted in CVE-2025-6543. It identifies vulnerable versions through SNMP and SSH banner grabbing...

Exploit for Improper Restriction of Operations within the Bounds of a Memory Buffer in Citrix Netscaler_Application_Delivery_Controller

CTT-Citrix-RCE-v1.0---Convergent-Time-Theory-Enhanced-Exploit...

PT-2026-4277

Edge Crisis: CISA added two critical vulnerabilities to the Known Exploited Vulnerabilities catalog yesterday. CVE-2026-21809 and CVE-2026-21810 target Citrix Workspace and Ivanti Connect Secure. Federal agencies have until February 11 to remediate...

PT-2026-4276

Edge Crisis: CISA added two critical vulnerabilities to the Known Exploited Vulnerabilities catalog yesterday. CVE-2026-21809 and CVE-2026-21810 target Citrix Workspace and Ivanti Connect Secure. Federal agencies have until February 11 to remediate...

PT-2026-4337

CVE-2026-23916 - Citrix NetScaler Denial of Service CVE ID : CVE-2026-23916 Published : Jan. 20, 2026, 5:16 a.m. | 1 hour, 29 minutes ago Description : Rejected reason: Not used Severity: 0.0 | NA Visit the link for more details, such as CVSS details, affected products, timeline, and more...

PT-2026-4333

CVE-2026-23912 - Citrix NetScaler Unvalidated Redirect CVE ID : CVE-2026-23912 Published : Jan. 20, 2026, 5:16 a.m. | 1 hour, 29 minutes ago Description : Rejected reason: Not used Severity: 0.0 | NA Visit the link for more details, such as CVSS details, affected products, timeline, and more...

CVE-2021-22956

An uncontrolled resource consumption vulnerability exists in Citrix ADC 13.0-83.27, 12.1-63.22 and 11.1-65.23 that could allow an attacker with access to NSIP or SNIP with management interface access to cause a temporary disruption of the Management GUI, Nitro API, and RPC communication...