Hackers exploit critical Citrix ADC and Gateway zero day, patch now

Citrix strongly urges admins to apply security updates for an ‘Critical’ zero-day vulnerability (CVE-2022-27518) in Citrix ADC and Gateway that is actively exploited by state-sponsored hackers to gain access to corporate networks. This new vulnerability allows an unauthenticated attacker to Read More …

Critical Citrix DDoS Bug Shuts Down Network, Cloud App Access

A critical security bug in the Citrix Application Delivery Controller (ADC) and Citrix Gateway could allow cyberattackers to crash entire corporate networks without needing to authenticate. The two affected Citrix products (formerly the NetScaler ADC and Gateway) are used for Read More …

US Census Bureau hacked in January 2020 using Citrix exploit

US Census Bureau servers were breached on January 11, 2020, by hackers who exploited a Citrix ADC zero-day vulnerability as the US Office of Inspector General (OIG) disclosed in a recent report. “The purpose of these servers was to provide Read More …

Feds Warn Nation-State Hackers are Actively Exploiting Unpatched Microsoft Exchange, F5, VPN Bugs

The U.S. government is warning that Chinese threat actors have successfully compromised several government and private sector entities in recent months, by exploiting vulnerabilities in F5 BIG-IP devices, Citrix and Pulse Secure VPNs and Microsoft Exchange servers. Patches are currently Read More …

Patch List: Adobe, Citrix, Intel, and vBulletin Vulns

Vulnerabilities expose enterprises’ systems to compromise. Now that many employees are working from home and operating devices outside the more secure office environments, the need to patch vulnerabilities as soon as they are discovered has become even more pressing. Aside Read More …

Hacking isn’t canceled: Chinese group attacked Citrix and Zoho during coronavirus lockdown

A prolific state-backed Chinese cyber espionage operation started 2020 with one of its largest hacking campaigns – even though the coronavirus lockdown in China appeared to have an impact on the group’s output. The global operation by hacking group APT 41 – Read More …

Nice Try: 501 (Ransomware) Not Implemented

Since January 10, 2020, FireEye has tracked extensive global exploitation of CVE-2019-19781, which continues to impact Citrix ADC and Gateway instances that are unpatched or do not have mitigations applied. We previously reported on attackers’ swift attempts to exploit this vulnerability and the post-compromise deployment Read More …

Critical Citrix Bug Puts 80,000 Corporate LANs at Risk

Digital workspace and enterprise networks vendor Citrix has announced a critical vulnerability in the Citrix Application Delivery Controller (ADC) and Citrix Gateway. If exploited, it could allow unauthenticated attackers to gain remote access to a company’s local network and carry Read More …