A remote code execution vulnerability exists due to improper input validation, which can allow an unauthenticated attacker to execute arbitrary commands
CVSS score
9.5
EPSS probability
%1.1
Risk score
0.2
Published
22 d ago
Related Security News
Articles and analysis bulletins in which the press and security publications have covered this vulnerability:
Threat Brief: Active Exploitation of PAN-OS CVE-2026-0257 (Updated October 19)
Ransomware operators including Spikey Scorpius (aka Qilin) and Tarnished Scorpius (aka Inc) are exploiting PAN-OS vulnerability CVE-2026-0257. The post Threat Brief: Active Exploitation of PAN-OS CVE-2026-0257 (Updated October 19) appeared first on Unit 42.
Rapid7 Analysis: NetScaler intrusions chaining CVE-2026-88771 and CVE-2026-88779
OverviewIn early October 2026, Rapid7 analysts investigated a compromise of a Citrix NetScaler ADC appliance. The appliance was running an affected 14.1 build and was exposed to active exploitation targeting NetScaler authentication and SAML deployments.The intrusion achieved root code execution, deployed multiple persistence mechanisms, installed PHP web shells, created outbound command-and-control and internal tunnelling capabilities, performed targeted reconnaissance of DNS, LDAP/Active Directory, management services and VMware vCenter infrastructure, and exfiltrated NetScaler configuration
Kiteworks & Citrix Incidents Show Challenges of Zero-Day Response
One company told customers to power down its data-protection platform during a nine-hour window, while the other remained mum on reported attacks prior to releasing a patch for its product.
Threat Brief: NetScaler Zero Days CVE-2026-88771 and CVE-2026-88772 Exploited in the Wild (Updated September 30)
Unit 42 is aware of possible 0-day activity against NetScaler devices. Citrix reports CVE-2026-88771, CVE-2026-88772 have been exploited in the wild. The post Threat Brief: NetScaler Zero Days CVE-2026-88771 and CVE-2026-88772 Exploited in the Wild (Updated September 30) appeared first on Unit 42.
Dual NetScaler Zero-Days Trigger Chaos for Citrix Customers
The critical vulnerabilities, which impact default configurations of NetScaler products, essentially give attackers a skeleton key to customers' networks.
Zero-Day Exploitation of Citrix NetScaler ADC and Gateway: CVE-2026-88771 and CVE-2026-88772
OverviewOn September 27, 2026, Citrix disclosed eight new vulnerabilities affecting NetScaler ADC and NetScaler Gateway, including two critical remote code execution (RCE) vulnerabilities: CVE-2026-88771 and CVE-2026-88772. Both of these RCE vulnerabilities carry a critical CVSSv4 score of 9.5, and both have been confirmed as being actively exploited in the wild as zero-days prior to the vendor disclosure. CVE-2026-88771 affects vulnerable NetScaler deployments in their default configuration, with no additional product features required. The vendor has also indicated that the attack complexity
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