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CVE record · CVE-2026-28318

SolarWinds Serv-U Unauthenticated Denial of Service Vulnerability

CVSS 7.5 HighCriticalIn CISA KEVEPSS 0.44 · 98th percentile

Critical, because:

  • In CISA’s KEV catalogue since 5 Jun 2026: it is known to be exploited.
  • CVSS score 7.5 (7.0 or more) and EPSS 0.44 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical

Published by the CVE Program (CNA: SolarWinds) at 4 Jun 2026, 14:05 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
SolarWinds Serv-U
  • affected 15.5.4 and earlier custom
Other versions: unaffected
Identifiers
CVE-2026-28318
CNA
SolarWinds
Weakness (CWE)
CWE-400
Tags
Published
4 Jun 2026
Updated
21 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CNA (SolarWinds)
  • CISA KEV Listed since 5 Jun 2026: known to be exploited.
  • EPSS 0.44, the 98th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 4 Jun 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.