Threat database

CVE-2026-88771 is a critical remote code execution vulnerability disclosed by Citrix affecting NetScaler Application Delivery Controller and NetScaler Gateway. It allows unauthenticated attackers to execute arbitrary commands without requiring optional features. Exploitation involves a staged chain using access-log poisoning with Base64-encoded payloads in HTTP User-Agent headers and authentication log poisoning with forged PPE failure messages. A vulnerable Perl diagnostic script executes these commands with elevated privileges. Observed malicious activities include web shell deployment, enabling PHP, and delivery of FreeBSD implants. The vulnerability has been confirmed exploited worldwide and added to CISA's Known Exploited Vulnerabilities catalog. No patch or remediation details are provided in the available data.

CVE-2026-53564 is a medium severity vulnerability in Citrix UniconOS that allows arbitrary file read and write operations. It affects versions before 2607.2 CR and before 2603 LTSR CU2. The vulnerability has a CVSS 4.0 base score of 5.1, indicating a moderate risk. No known exploits are reported in the wild, and no official patch links are provided in the available data.

CVE-2026-53563 is a medium severity vulnerability in Citrix UniconOS that allows persistent command execution. It affects versions before 2607.2 CR and before 2603 LTSR CU2. The vulnerability has a CVSS 4.0 base score of 6.9, indicating a locally exploitable issue with low privileges required and no user interaction needed. No official patch or remediation details are provided in the available data.

CVE-2026-84419 is an out-of-bounds write vulnerability in Citrix Workspace app for Windows. It affects versions before 2603.20 CR, before LTSR 2607 Hotfix 1, and before LTSR 2507 CU3 Hotfix 1. The vulnerability has a CVSS 4.0 base score of 6.8, indicating a medium severity level. It requires local access with low privileges and no user interaction is needed. There are no known exploits in the wild at this time.

CVE-2026-53562 is a high-severity vulnerability in Citrix UniconOS involving improper link resolution before file access, also known as 'link following'. This flaw affects UniconOS versions before 2607 CR and before 2603 LTSR CU2. It allows an attacker with limited privileges to potentially manipulate file access due to incorrect handling of symbolic links. The vulnerability has a CVSS 4.0 score of 8.5, indicating a significant risk. No known exploits are reported in the wild, and no patch links are provided in the data. The product is not a cloud service, so remediation depends on vendor advisories. The affectedVersions field in the input is not clearly stated beyond an invalid placeholder (=0), so no canonical affected versions can be confirmed from the data.

A high-severity vulnerability (CVE-2026-88779) affects Citrix NetScaler ADC and NetScaler Gateway products, including their FIPS variants. Multiple versions prior to 14.1-73.41, 13.1-64.28, and 13.1-37.282 are impacted. The vulnerability is publicly known but no confirmed exploits have been observed in the wild. No patch or remediation information is currently available.

CVE-2026-88778 is a high-severity vulnerability in Citrix NetScaler ADC and Gateway involving predictable exact values derived from previous values. This weakness can affect versions before 14.1-73.37 and 13.1-64.23 for ADC and Gateway products, including certain FIPS and NDcPP variants. The vulnerability is classified under CWE-342, indicating issues with predictable values that may weaken security mechanisms.

CVE-2026-88777 is a memory overflow vulnerability in Citrix NetScaler ADC and Gateway products. It affects versions prior to 14.1-73.37 and 13.1-64.23, including certain FIPS and NDcPP variants. The flaw can cause unpredictable or erroneous behavior, including denial of service conditions. The vulnerability has a high severity rating with a CVSS 4.0 score of 8.8. No known exploits in the wild have been reported. The vendor has not provided explicit patch links or advisories in the provided data.

CVE-2026-88776 is a memory overflow vulnerability in Citrix NetScaler ADC and Gateway products. It affects versions prior to 14.1-73.37 and 13.1-64.23, including specific FIPS and NDcPP builds. The flaw can cause unpredictable or erroneous behavior and may lead to Denial of Service conditions. The vulnerability has a high severity rating with a CVSS 4.0 score of 8.8. No known exploits are reported in the wild. This issue is categorized under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer).

CVE-2026-88775 is a memory overflow vulnerability in Citrix NetScaler ADC and Gateway products. It affects versions prior to 14.1-73.37 and 13.1-64.23, including FIPS and NDcPP variants. The flaw can cause unpredictable or erroneous behavior, including denial of service. The vulnerability has a high severity rating with a CVSS score of 8.8. No known exploits are reported in the wild. The vendor has not provided explicit patch links or advisories in the provided data.

CVE-2026-88773 is a critical vulnerability in Citrix NetScaler ADC and Gateway involving inconsistent interpretation of HTTP requests, known as HTTP Request/Response smuggling. This flaw affects multiple versions of the ADC and Gateway products prior to specific fixed releases. The vulnerability has a high CVSS 4.0 score of 9.3, indicating a severe risk. No known exploits are reported in the wild. The issue can lead to significant impact due to the nature of HTTP request smuggling attacks.

CVE-2026-88774 is a high-severity vulnerability in Citrix NetScaler ADC and Gateway products. It allows a feature policy bypass due to improper use of HTTP URL based expressions. The issue affects multiple versions prior to 14.1-73.37 and 13.1-64.23, including FIPS and NDcPP variants. The vulnerability has a CVSS 4.0 score of 7.0, indicating a network attack vector with low complexity but partial impact on confidentiality and integrity. No known exploits are reported in the wild. No vendor advisory or patch information is provided in the input data.

Vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to Remote Code Execution or Denial of Service

Improper input validation vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to an unauthenticated attacker to execute arbitrary commands.

Out-of-bounds write vulnerability in Citrix Citrix Workspace app for Windows. This issue affects Citrix Workspace app for Windows: before 2603.11 Current Release (CR), before 2507.1 LTSR CU3, and before LTSR 2607.

External control of file name or path vulnerability in Citrix WorkSpace App on MacOS. This issue affects WorkSpace App: 2607.

Out-of-bounds read vulnerability in Citrix Citrix Secure Access Client for Windows. This issue affects Citrix Secure Access Client for Windows: before 26.6.1.20.

Improper Privilege Management vulnerability in Citrix Secure Access Client for Windows, Citrix Citrix Endpoint Analysis Client for Windows. This issue affects Secure Access Client for Windows: before 26.6.1.20; Citrix Endpoint Analysis Client for Windows: before 26. 5.1.7.

CVE-2024-8069 is a vulnerability in Citrix Session Recording involving deserialization of untrusted data. It allows limited remote code execution with the privileges of the NetworkService account. Exploitation requires the attacker to be an authenticated user on the same intranet as the session recording server. The vulnerability has been exploited in the wild. No specific affected versions or patch information is provided.