Solarwinds web help desk, deserialization of untrusted data: 5 records, one defect family
Solarwinds web help desk has been reported 5 separate times for the same kind of mistake, CWE-502, between 2024-08-13 and 2026-01-28. A defect family is our own grouping of the CVE corpus: every record naming one product and one weakness class, collected so a repeat is visible as a repeat. No public source publishes this, and what this page counts is how often this one product has gone wrong in this one way.
What this page is, and what it is not
The records are public. This grouping is not. No source publishes defect families, so we built them: every record in the corpus sorted by the product an authority named and the weakness class carried with it, 21316 families over 105586 records. This one holds every record that names Solarwinds web help desk and carries CWE-502, matched character for character. We show the join because a grouping you cannot check is a grouping you should not cite.
That is 5 filings, between 2024-08-13 and 2026-01-28, landing on the same weakness class in the same product. At this count it is a repeat rather than a pattern, and the roster below is short enough to read in full. This is what we held on 2026-09-20.
A repeat is evidence about where to look. If you are reviewing Solarwinds web help desk, the records below say which mistake has already been found more than once, which is the cheapest place a reviewer can start. If you are asking the vendor a question, a count under one weakness class is a better question than any single record is.
What this page cannot tell you is decided by what was joined. A product name and a weakness class settled membership, so those two values are the whole of what the page asserts. Records here may sit in the same line of code or in unrelated parts of the product, and we hold no value that separates those cases. A fixed version named in one record closes that record and says nothing about the others. And nothing here describes anyone's systems, because no value in this family connects a product name to an installation.
The names the authorities used
One spelling, used by every authority that filed one of these records: solarwinds web help desk.
Family membership: held values. Joined on the product and weakness class the assigning authorities wrote, with no model involved.
What the records offer
No record in this family publishes a fixed version in held sources.
3 records are listed by CISA with a required action, which carries a federal remediation deadline on its own page.
The earliest was published 2024-08-13 and the latest 2026-01-28. That span is how long this product kept producing this weakness, not how long any one record took to fix.
What this family was researched, not held
Three fixes in a row for one Web Help Desk deserialization path
SolarWinds says the recurrence itself in its own advisory. CVE-2025-26399 is described there as a patch bypass of CVE-2024-28988, which in turn is a patch bypass of CVE-2024-28986, all reaching the same AjaxProxy deserialization path, with Web Help Desk 12.8.7 and every earlier version affected and 12.8.7 HF1 as the fix. The first of the three, in August 2024, was reported as exploitable without authentication and SolarWinds said it could not reproduce that without authentication after testing; by the third, the advisory calls it unauthenticated without qualification. In January 2026 SolarWinds patched further deserialization records in the same product, CVE-2025-40551 and CVE-2025-40553, both described as leading to remote code execution without authentication, with Web Help Desk 2026.1 as the fix.
Web Help Desk is a ticketing system that tends to face users, and the federal catalog lists three records in this grouping as exploited, one of them in ransomware use. Because each of the first three fixes was bypassed by the next record, the exact version you run matters more here than the fact that you patched at some point.
This grouping says these records read alike. It does not say they are one vulnerability or that one update closes another, and the bypass relationships repeated above are SolarWinds' statements about specific records, not a property of the grouping.
Written from solarwinds.com, thehackernews.com, rapid7.com, cisa.gov. Stated at high confidence. Nothing in this box is a value the index holds, and none of it opens a receipt.
What this page does not cover
This is a family of records that read alike. It is not a shared vulnerability, not an inventory, and not a statement that one fix closes the rest. Each record's own state, its own dates and its own receipts are on its own page.
Grouped by shared product and weakness, not by shared vulnerability. Each record's own state is on its own page.
Everything this vendor has, including records outside this family:
5 records, read from the index as it stood on 20 Sep 2026. Every row opens the record it names, and every value on that record opens its own receipt.