RCE in widely used SolarWinds Serv-U enabling remote root code execution on server hosts; high-impact enterprise file-transfer infrastructure vulnerability likely to make cybersecurity news.
CVE-2026-28304
RCE in SolarWinds Serv-U allowing remote root code execution
Is CVE-2026-28304 being exploited?
Not confirmed. CVE-2026-28304 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.79% probability of exploitation in the next 30 days.
How severe is CVE-2026-28304?
CVE-2026-28304 is rated Critical with a CVSS score of 9.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-28304?
Yes. A fix has been recorded for CVE-2026-28304. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-28304 affect?
CVE-2026-28304 affects SolarWinds Serv-U (Linux/Unix - root impact), SolarWinds Serv-U (Windows - lower impact). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-28304?
Apply vendor patch immediately; isolate/disable Serv-U and restrict network access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attackers can execute arbitrary code as root on Serv-U hosts (full system compromise); Windows deployments have reduced impact.
Immediate action required
- affected15.5.4 HF1 and below
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.