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Vulnerabilities

Vulnerability · CVE-2026-28318

SolarWinds Serv-U Uncontrolled Resource Consumption Vulnerability

Published Jun 4, 2026 · catalog updated Jul 22, 2026 · SolarWinds Serv-U

Patch now

CVE-2026-28318 is in the CISA known-exploited catalog, due Jun 19, 2026. Confirm SolarWinds Serv-U against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
High7.5
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
1.94%
Remediation
Remediation guidance
Affected products
cpe solarwinds/serv-u · vendor SolarWinds Serv-U

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe solarwinds/serv-u15.5.4
  • vendor SolarWinds Serv-Uversion unspecified

How to fix CVE-2026-28318

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-28318 is in the CISA known-exploited catalog, due Jun 19, 2026. Confirm SolarWinds Serv-U against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with 15.5.4. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-400: Uncontrolled Resource Consumption. EPSS 1.94%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 4, 2026 · Catalog

    Detected

    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

  2. Jun 5, 2026 · CISA KEV

    Known exploited

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  3. Jun 19, 2026 · CISA KEV

    Remediation due

    Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  4. Jul 22, 2026 · Catalog

    Updated

    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

Sources

  • CISA KEVConfirmed exploitationCVE-2026-28318

    SolarWinds Serv-U contains an uncontrolled resource consumption vulnerability that allows specially crafted POST requests using the Content-Encoding: deflate header to crash the Serv-U service without authentication.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2026-28318

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-28318

    30-day exploitation probability 1.9%

    first.org
  • NIST NVDVulnerability recordCVE-2026-28318

    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 u

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2026-28318

    SolarWinds Serv-U contains an uncontrolled resource consumption vulnerability that allows specially crafted POST requests using the Content-Encoding: deflate header to crash the Serv-U service without authentication.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.