Coverage › CVE-2025-26399
CVE-2025-26399 Unmapped
SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability
- Vendor / product
- SolarWinds — Web Help Desk
- Description (CISA)
- SolarWinds Web Help Desk contain a deserialization of untrusted data vulnerability in AjaxProxy that could allow an attacker to run commands on the host machine.
- Added to KEV
- 2026-03-09 — after the latest CTID mapping snapshot (2025-07-28)
- Due date
- 2026-03-12
- Required action
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- Known ransomware use
- Known
- CWE
- CWE-502
- CISA notes
- https://www.solarwinds.com/trust-center/security-advisories/cve-2025-26399
https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_12-8-7-hotfix-1_release_notes.htm
https://nvd.nist.gov/vuln/detail/CVE-2025-26399 - Elsewhere
- cve.org · NVD · CISA KEV · JSON
ATT&CK techniques
No public source states how this vulnerability is exploited in ATT&CK terms.
The only authoritative CVE → ATT&CK mapping in the open — CTID's Mappings Explorer, pinned to a KEV snapshot of 2025-07-28 and ATT&CK 16.1 — does not include CVE-2025-26399. This entry was added to KEV on 2026-03-09, after that snapshot; of the 283 entries added since, 0 have a mapping. CISA's catalogue carries no technique field. kevmap does not infer techniques from the CWE (CWE-502) — here is why — and does not guess.
This page will change state automatically if a mapping is published. What is shown above is everything CISA publishes about the entry.
Sigma rules tagged with this CVE
1 rule in SigmaHQ carries the tag cve.2025-26399. These are shown as detection content for the CVE itself. Their ATT&CK tags are deliberately not rendered here: a rule author's tag is not an authoritative statement of how the vulnerability is exploited, and this page does not show techniques for unmapped entries.