CVE-2025-40551

tively. Operational Example: SolarWinds Web Help Desk The SolarWinds Web Help Desk remote code execution vulnerability (CVE-2025-40551) illustrates why rapid validation matters. After Horizon3.ai’s Attack Team responsibly disclosed the vulnerability to SolarWinds, development of a Rapid Response assessment began immediately. When SolarWinds released it

Disclosed at the end of January, the SolarWinds vulnerability was likely exploited as a zero-day since December 2025.

SolarWinds Web Help Desk (WHD) is under attack, with recent incidents exploiting a chain of zero-day and patched vulnerabilities dating back to late 2025, an analysis of customer reports by security company Huntress has found. Until now, it has been unclear which combination of recent WHD vulnerabilities were behind a series of compromises of customer […]

Vulnerable SolarWinds Web Help Desk instances were exploited in December 2025 for initial access.

Huntress confirmed active SolarWinds Web Help Desk exploits, where attackers installed Zoho tools for persistence, and used Velociraptor for control. On February 7, 2026, Huntress investigated an active attack abusing SolarWinds Web Help Desk flaws. Attackers exploited unpatched versions to run code remotely, then quickly installed Zoho ManageEngine tools for persistent remote access and Cloudflare […]

The critical-severity SolarWinds Web Help Desk flaw could lead to unauthenticated remote code execution.

U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds SolarWinds Web Help Desk, Sangoma FreePBX, and GitLab flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added SolarWinds Web Help Desk, Sangoma FreePBX, and GitLab flaws to its Known Exploited Vulnerabilities (KEV) catalog. Below are the flaws added to the catalog: The first […]

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SolarWinds patched six Web Help Desk vulnerabilities, including four critical flaws exploitable without authentication for RCE or auth bypass. SolarWinds released security updates to address six Web Help Desk vulnerabilities, including four critical bugs that allow unauthenticated remote code execution or authentication bypass. The three critical flaws found by watchTowr, and specifically by researcher Piotr […]

The four critical flaws could be exploited without authentication for remote code execution or authentication bypass.

SolarWinds has fixed six critical and high-severity vulnerabilities in its popular Web Help Desk (WHD) support ticketing and asset management solution, and is urging customers to upgrade to v2026.1 as soon as possible. The vulnerabilities The WHD vulnerabilities fixed were unearthed by Jimi Sebree from Horizon3.ai and Piotr Bazydlo from watchTowr. Sebree flagged a security control bypass flaw (CVE-2025-40536), hardcoded/static credentials (CVE-2025-40537), and an untrusted data deserialization vulnerability (CVE-2025-40551). While the first two may allow … More →

SolarWinds is yet again disclosing security vulnerabilities in one of its widely-used products. The company has released updates to patch six critical authentication bypass and remote command execution vulnerabilities in its Web Help Desk (WHD) IT software. These flaws could allow attackers to bypass authentication, perform remote code execution (RCE), and access certain functionality that should […]

SolarWinds Web Help Desk Deserialization Vulnerability | Active Exploitation

CVE-2025-40551 details multiple chained vulnerabilities in SolarWinds Web Help Desk that allow unauthenticated attackers to achieve remote code execution on vulnerable instances.