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CVE-2026-28318

7.5, high Known exploited

SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
7.5, high high CVSS v3.1
EPSS, next 30 days
2% higher than 79.7% of scored CVEs
Exploitation
Confirmed in the wild
Published
4 Jun 20264 months ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 5 Jun 2026. US federal agencies had to remediate by 19 Jun 2026, a deadline that has passed.

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.

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

Details

Vendor
SolarWinds
Product
Serv-U
Weakness
CWE-400 (opens in a new tab)
Status
Analyzed
Updated
22 Jul 2026
Assigner
psirt@solarwinds.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References 3

Advisories 1

Other references 2

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other SolarWinds CVEs

Every SolarWinds CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2025-40536 SolarWinds Web Help Desk Security Control Bypass Vulnerability KEV EPSS 74% 9.8, critical
  • CVE-2025-40551 SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability KEV EPSS 84% 9.8, critical
  • CVE-2025-26399 SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability KEV EPSS 90% 9.8, critical
  • CVE-2024-28987 SolarWinds Web Help Desk Hardcoded Credential Vulnerability KEV EPSS 93% 9.1, critical
  • CVE-2024-28986 SolarWinds Web Help Desk Deserialization of Untrusted Data Vulnerability KEV EPSS 85% 9.8, critical
  • CVE-2024-28995 SolarWinds Serv-U Path Traversal Vulnerability KEV EPSS 100% 7.5, high
  • CVE-2021-35247 SolarWinds Serv-U Improper Input Validation Vulnerability KEV EPSS 3% 5.3, medium
  • CVE-2021-35211 SolarWinds Serv-U Remote Code Execution Vulnerability KEV EPSS 91% 10, critical

Beyond this page

Is CVE-2026-28318 in your network?

This page tells you how dangerous CVE-2026-28318 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2026-28318 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-28318 comes with the devices to patch.

    Learn more about EXYS7600 OCELOT

  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.