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SolarWinds released a security update for Web Help Desk 2026.1 and all previous versions to remediate CVE-2026-28299, a network-exploitable denial-of-service vulnerability. According to the vendor notice cited by EG-FinCIRT, the flaw has low attack complexity and can be triggered without privileges or user interaction, increasing the risk of opportunistic exploitation against exposed systems.
Successful exploitation could exhaust memory, crash the Web Help Desk server, and disrupt service availability. Organizations using SolarWinds Web Help Desk were urged to validate and deploy the update as soon as testing is complete to reduce the risk of outages caused by unauthenticated attacks.
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1 event from the most recent confirmed update back to the earliest known activity.
On 2026-06-04, SolarWinds released a security update for SolarWinds Web Help Desk 2026.1 and all previous versions to remediate CVE-2026-28299, a network-exploitable denial-of-service vulnerability. The flaw could exhaust memory, crash the Web Help Desk server, and cause denial-of-service conditions.
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SolarWinds issued another fix for **Web Help Desk** after attackers were found exploiting a patch bypass that left a previously addressed vulnerability still reachable. The report says the flaw was being actively exploited, forcing the company to reissue remediation guidance and update customers again to close the bypass condition. The incident highlights the operational risk of incomplete vulnerability remediation, where an initial patch can be circumvented and exposed systems remain vulnerable despite prior updates. Organizations running Web Help Desk were urged to apply the latest vendor fix immediately and verify that earlier mitigations had not left the product exposed to continued exploitation.
Jun 29, 2026
**CVE-2025-26399** is a **critical insecure deserialization** flaw (CWE-502) in *SolarWinds Web Help Desk* that enables **unauthenticated remote code execution/command execution** over the network. The issue resides in the product’s **`AjaxProxy`** component, where untrusted serialized data can be processed without sufficient validation, allowing an attacker to deliver a crafted payload that results in arbitrary command execution on the host running the help desk application. Multiple reports indicate the vulnerability is **actively exploited in the wild**, prompting **CISA** to add CVE-2025-26399 to the **Known Exploited Vulnerabilities (KEV)** catalog. NetSPI notes the flaw was disclosed in 2025 and is described as a **patch bypass** related to earlier issues (**CVE-2024-28988** and **CVE-2024-28986**), and recommends immediate remediation by upgrading to **SolarWinds Web Help Desk 12.8.7 Hotfix 1 or later**; if patching is delayed, organizations should restrict network exposure of the server and increase monitoring for suspicious process execution and outbound connections.
Jun 29, 2026
SolarWinds released security updates for *Web Help Desk (WHD)* to address multiple critical vulnerabilities that could allow **unauthenticated remote attackers** to bypass authentication and achieve **remote code execution (RCE)**. The patched issues include two critical authentication bypass flaws, **CVE-2025-40552** and **CVE-2025-40554** (reported by watchTowr researcher Piotr Bazydlo), and two critical RCE flaws tied to **untrusted data deserialization**, **CVE-2025-40553** (Bazydlo) and **CVE-2025-40551** (reported by Horizon3.ai researcher Jimi Sebree), enabling remote command execution without prior access. SolarWinds also fixed a high-severity **hardcoded credentials** issue, **CVE-2025-40537**, which could enable unauthorized access to administrative functions under certain conditions. The vendor advised administrators to upgrade to **Web Help Desk 2026.1** and patch quickly, noting WHD has a history of being targeted and previously had vulnerabilities flagged as actively exploited by CISA, reinforcing the likelihood of rapid attacker interest following disclosure and patch availability.
Jun 29, 2026