Overview
CVE-2026-28318 has been added to the CISA Known Exploited Vulnerabilities catalog. Published on June 04, 2026. Threat actors are actively exploiting this vulnerability in real-world attacks.
SolarWinds Serv-U is susceptible to specially crafted POST requests that crash the Serv-U service without authentication using Content-Encoding: deflate.
Threat Intelligence
| Metric | Value |
|---|---|
| CVE ID | CVE-2026-28318 |
| Severity | HIGH |
| CVSS Score | 0.0/10 |
| CISA KEV | ✅ Yes — Actively Exploited |
| KEV Date Added | June 05, 2026 |
| Remediation Deadline | June 19, 2026 |
| EPSS Score | 10.7% exploit probability |
| EPSS Percentile | Top 99% of all CVEs |
Why This Matters
This vulnerability has been added to the CISA Known Exploited Vulnerabilities (KEV) catalog, which means threat actors are actively exploiting it in real-world attacks.
Federal agencies are required to remediate by June 19, 2026. All organizations should treat this deadline as a strong recommendation.
Recommended Actions
- Verify exposure — Determine if your environment uses the affected software.
- Apply patches — Update to the latest version as soon as a fix is available.
- Monitor for compromise — Check logs for unusual activity.
- Meet the deadline — CISA recommends remediation by June 19, 2026.
References
CVE data aggregated from the National Vulnerability Database (NVD), CISA Known Exploited Vulnerabilities catalog, and FIRST EPSS. Analysis updated as new intelligence becomes available. Last updated: 2026-06-05.