External risk intelligence

SolarWinds Web Help Desk: Remote Command Execution Vulnerability.

CVE advisoryKnown Exploit

CVE-2025-26399

SolarWinds Web Help Desk is affected by a vulnerability allowing unauthenticated attackers to execute commands remotely. This could lead to unauthorized access and control of host machines, posing a significant business risk.

4Halo Surface Signal

Deserialization

Solarwinds Web Help Desk

12.8.6 and earlier12.8.7

External exposure likelihood

Halo Surface Signal score for CVE-2025-26399

SolarWinds Web Help Desk is a centralized web-based application typically deployed to provide service management capabilities to an organization. These systems are frequently configured as internet-facing web portals or gateways to allow users and technicians to access help desk resources and ticketing systems remotely, making them commonly reachable from the public internet.

Horizon Alert

Summary of the vulnerability and why it matters

SolarWinds Web Help Desk contains a critical vulnerability that allows for unauthenticated remote code execution. This flaw stems from the insecure deserialization of data within the AjaxProxy component. The vulnerability has been exploited as a bypass to previous security patches, indicating a recurring weakness in the product's security. Exploitation of this vulnerability can grant attackers the ability to run commands on the affected host machine.

  • Vulnerable: SolarWinds Web Help Desk
  • Flaw: Insecure data deserialization
  • Impact: Remote command execution on host machines

Attack Path

How an attacker could exploit the issue

An unauthenticated vulnerability in SolarWinds Web Help Desk allows an attacker to execute commands on the host system. This issue stems from a deserialization flaw within the AjaxProxy component, which has been identified as a bypass of previous security updates. Exploitation of this vulnerability could lead to unauthorized command execution on affected servers.

  • External network exposure required.
  • Attacker sends malicious data.
  • Attacker gains host command control.

Live Threat

Current exploitation, exposure, and threat context

A critical vulnerability in SolarWinds Web Help Desk allows attackers to execute commands on affected systems. This issue is a bypass of previously disclosed vulnerabilities. Exploitation could lead to unauthorized command execution, potentially compromising the host machine.

  • Attackers with low skill can exploit.
  • No access or conditions required.
  • Business risk is urgent.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

An unauthenticated remote code execution vulnerability exists in SolarWinds Web Help Desk that could allow an attacker to run commands on the host machine. This vulnerability is a bypass of previously identified vulnerabilities. The criticality of this issue warrants immediate attention to protect organizational systems and data.

  • Identify all instances of Web Help Desk.
  • Reduce exposure or isolate affected systems.
  • Apply vendor updates and validate fixes.
  • Monitor for related security events.

Frequently asked questions

What is SolarWinds Web Help Desk?

SolarWinds Web Help Desk is an IT service management software designed to streamline and automate tasks such as ticketing, asset management, and workflow automation. It helps organizations efficiently manage and resolve service requests by tracking, assigning, and prioritizing support tickets. The software can also integrate with other SolarWinds tools for network and server monitoring, automatically converting alerts into help desk tickets.

What is CVE-2025-26399 and what is its weakness class?

CVE-2025-26399 is a critical vulnerability in SolarWinds Web Help Desk. The weakness class identified is CWE-502, which pertains to the insecure deserialization of untrusted data. This flaw allows unauthenticated remote code execution.

How can CVE-2025-26399 be triggered and what is its scope?

The vulnerability is triggered through the insecure deserialization of untrusted data within the AjaxProxy component of SolarWinds Web Help Desk. This allows an attacker to execute commands on the host machine without any authentication, indicating a broad scope of potential impact.

What is the relevance of CVE-2025-26399, and why is it considered significant?

CVE-2025-26399 is significant because it represents a bypass of previous security patches (CVE-2024-28988 and CVE-2024-28986), indicating a recurring security weakness. The CISA has identified it as a known exploited vulnerability, highlighting its active threat potential and the urgent need for remediation.

What steps should be taken to respond to CVE-2025-26399?

To respond to CVE-2025-26399, organizations should identify all instances of SolarWinds Web Help Desk, reduce their exposure, or isolate affected systems. Applying vendor-provided updates and validating the fixes is crucial. Continuous monitoring for related security events is also recommended.

References