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CVE-2025-26399 is a critical unauthenticated remote code execution vulnerability in SolarWinds Web Help Desk. The flaw resides in the AjaxProxy component, which deserializes attacker-controlled data without sufficient validation, resulting in deserialization of untrusted data. A remote attacker can send a crafted serialized payload to the exposed AjaxProxy functionality and trigger execution of arbitrary commands on the underlying host. The issue affects SolarWinds Web Help Desk versions prior to 12.8.7 Hotfix 1. CVE-2025-26399 is notable as a patch bypass of CVE-2024-28988, which itself was a bypass of CVE-2024-28986, indicating the underlying deserialization attack surface was not fully remediated in earlier fixes.
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No valid public exploits. Mallory filtered out 2 candidates as fakes, detection scripts, or README-only repos.
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163 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.