What is CVE-2025-40536?
SolarWinds Web Help Desk was found to be susceptible to a security control bypass vulnerability that if exploited, could allow an unauthenticated attacker to gain access to certain restricted functionality.
The record classifies CVE-2025-40536 under weakness class CWE-693. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 250 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 8.1 — HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS (FIRST)
- 70.6% probability of exploitation in the next 30 days, higher than 98.6% of all scored CVEs
- CISA KEV
- Listed since 2026-02-12, federal remediation deadline 2026-02-15
- Threadlinqs priority
- 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- Published
- 2026-01-28, last modified 2026-02-13
Is CVE-2025-40536 being exploited?
CISA added CVE-2025-40536 to the Known Exploited Vulnerabilities catalog on 2026-02-12, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-02-15 under BOD 22-01. It currently carries a trending score of 40 in the Threadlinqs vulnerability feed.
Affected products and versions
- Solarwinds: Web Help Desk
How to fix CVE-2025-40536
The record marks a vendor fix as available for CVE-2025-40536. Patch reference: https://www.solarwinds.com/trust-center/security-advisories/cve-2025-40536. Vendor advisory: https://www.solarwinds.com/trust-center/security-advisories/CVE-2025-40536. Because CVE-2025-40536 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-02-15. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2025-40536
No threat campaign in the Threadlinqs corpus currently references CVE-2025-40536, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.
Sources
Seeded from nvd and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.