CVE-2026-66424
Unauthenticated privilege escalation in SMS Alert plugin (<=3.9.7).
Is CVE-2026-66424 being exploited?
Not confirmed. CVE-2026-66424 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 0.32% probability of exploitation in the next 30 days.
How severe is CVE-2026-66424?
CVE-2026-66424 is rated Critical with a CVSS score of 9.8. 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-2026-66424?
Yes. A fix has been recorded for CVE-2026-66424. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-66424 affect?
CVE-2026-66424 affects SMS Alert Order Notifications plugin (<=3.9.7), Websites using the SMS Alert plugin (e-commerce/WooCommerce). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-66424?
Update plugin to a fixed version >3.9.7 or disable/remove until patched
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attackers can escalate to admin privileges, modify orders, access customer data, and perform administrative actions.
Immediate action required
- affected<= 3.9.7
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.