SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability (CVE-2024-28986)
SolarWinds Web Help Desk contains a deserialization of untrusted data vulnerability that could allow for remote code execution.
A remote attacker, without authentication, can achieve full data confidentiality loss, arbitrary modification of data, complete denial of service or system unavailability. Federal agencies are required to remediate by 2024-09-05 under CISA BOD 22-01.
This is a Deserialization of Untrusted Data (CWE-502) vulnerability in SolarWinds Web Help Desk. Exploitation requires remote network access, low attack complexity, no authentication required, and no user interaction required.
📧
Phishing link
🖼
Malicious file
🔓
Server compromised
Probably yes if any of these apply:
CISA added this CVE to the Known Exploited Vulnerabilities catalog on 2024-08-15 based on evidence of active exploitation in the wild. Federal agencies required to remediate by 2024-09-05.
Manual remediation steps
Apply the Vendor Patch
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog — apply the vendor's security update as soon as possible.
CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
References
No tested PowerShell script for this entry yet. We’re prioritising automation based on user demand.
References
Related vulnerabilities
KB5000871: Windows Server 2016 / 2019 Security Update (May 2026)
Microsoft Exchange Server
CVE-2021-26855
MEDIUM6.5Microsoft Defender for Identity Improper Authentication — Spoofing (CVE-2025-26685)
Microsoft Defender for Identity
CVE-2025-26685
HIGHIIS Security Updates Require Both Windows Update and Manual Configuration Review
Microsoft IIS