CVE-2026-28318 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-28318HIGH

SolarWinds Serv-U Unauthenticated Denial of Service Vulnerability

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  H    7.5   .0835   94.5   YES

AFFECTED
  Product  Versions                        Fixed
  Serv-U   15.5.4 and previous versions –  —

TIMELINE
  Feb 26  Reserved by SolarWinds
  Jun 5   Added to CISA KEV, remediation due 2026-06-19
  Jun 5   Published (CNA: SolarWinds)
  Jun 20  DUE DATE PASSED — CVE-2026-28318 (SolarWinds Serv-U). CISA remediation deadline was June 19, 2026; still in catalog.
  Jul 22  ENRICHED — CVE-2026-28318 (SolarWinds Serv-U). Received CVSS 7.5 and CPE data from NVD.

CWE-400 · CNA: SolarWinds · CVSS v3.1 · 3 references · NVD status: Analyzed · KEV due June 19, 2026

Description

SolarWinds Serv-U is susceptible to specially crafted POST requests that crash the Serv-U service without authentication using Content-Encoding: deflate. Mitigation steps are provided to secure customer environments in the SolarWinds Trust Center if you are unable to deploy the update

Lifecycle

Complete event history — 5 events, chronological
Date	Event	Detail
February 26, 2026	Reserved	Reserved by SolarWinds
June 5, 2026	KEV ADDED	Added to CISA KEV, remediation due 2026-06-19
June 5, 2026	Published	Published (CNA: SolarWinds)
June 20, 2026	DUE DATE PASSED	DUE DATE PASSED — CVE-2026-28318 (SolarWinds Serv-U). CISA remediation deadline was June 19, 2026; still in catalog.
July 22, 2026	ENRICHED	ENRICHED — CVE-2026-28318 (SolarWinds Serv-U). Received CVSS 7.5 and CPE data from NVD.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
SolarWinds	Serv-U	—	15.5.4 and previous versions	—

Weaknesses

CWE-400

References (3)

https://documentation.solarwinds.com/en/success_center/servu/content/release_notes/servu_15-5-4-hotfix-1_release_notes.htm [Release Notes]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-28318 [US Government Resource]
https://www.solarwinds.com/trust-center/security-advisories/CVE-2026-28318 [Vendor Advisory]

Authoritative record: CVE-2026-28318 at cve.org

Vendors: solarwinds

Weaknesses: CWE-400

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-28318 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.