CVE-2026-45558
Roxy-WI <= 8.2.6.4 allows RCE on load balancers via config-generation JSON.
Is CVE-2026-45558 being exploited?
Not confirmed. CVE-2026-45558 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 0.44% probability of exploitation in the next 30 days.
How severe is CVE-2026-45558?
CVE-2026-45558 is rated Critical with a CVSS score of 9.9. 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-2026-45558?
Yes. A fix has been recorded for CVE-2026-45558. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-45558 affect?
CVE-2026-45558 affects Roxy-WI <= 8.2.6.4, HAProxy load balancers. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-45558?
Limit Roxy-WI access; rotate credentials; monitor logs; patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated user can inject HAProxy directives into generated config, enabling remote code execution as haproxy user on health-checks.
Monitor only
- affected<= 8.2.6.4
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.