SolarWinds product with remote root RCE risk; high-impact supply‑chain/enterprise service vulnerability likely to affect many organizations.
CVE-2026-28305
IDOR in SolarWinds Serv-U allows root remote code execution on Unix builds.
Is CVE-2026-28305 being exploited?
Not confirmed. CVE-2026-28305 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-2026-28305?
CVE-2026-28305 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-2026-28305?
Yes. A fix has been recorded for CVE-2026-28305. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-28305 affect?
CVE-2026-28305 affects SolarWinds Serv-U (FTP/SFTP/Managed File Transfer) - Linux/Unix primarily, Serv-U on Windows (reduced impact). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-28305?
Isolate Serv‑U, revoke/restrict domain admin accounts, tighten home-dir permissions; apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attackers can achieve remote code execution as root via an IDOR; requires a domain account with admin + read/write home dir. Windows less impacted.
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.