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CVE-2025-26399 is a critical unauthenticated remote code execution vulnerability in the AjaxProxy component of SolarWinds Web Help Desk. AjaxProxy deserializes attacker-controlled data without sufficient validation, enabling crafted serialized input to invoke commands on the underlying host. The vulnerability affects Web Help Desk versions prior to 12.8.7 Hotfix 1 and is a bypass of CVE-2024-28988, itself an incomplete remediation of CVE-2024-28986.
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What an attacker gets, and what they’ve been doing with it.
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No valid public exploits. Mallory filtered out 2 candidates as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
164 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
The content only indicates a GitHub conversation about adding a detection template for CVE-2025-26399; no technical details about the vulnerability itself are provided.
A specific vulnerability listed among the report's analyzed CVEs, but without further detail in the content.
A named vulnerability affecting SolarWinds Web Help Desk that Resecurity says Anubis affiliates often exploit as part of mass exploitation of internet-facing systems.
A vulnerability in SolarWinds Web Help Desk used by attackers as an initial access vector in the STAC4713 campaign.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.