CVE-2026-49186
MQTT broker ACL bypass allows wildcard topics; device enumeration and rogue commands.
Is CVE-2026-49186 being exploited?
Not confirmed. CVE-2026-49186 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-2026-49186?
CVE-2026-49186 is rated High with a CVSS score of 8.6. 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-2026-49186?
Yes. A fix has been recorded for CVE-2026-49186. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-49186 affect?
CVE-2026-49186 affects Local MQTT brokers with topic ACLs disabled. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-49186?
Enable topic ACLs and restrict wildcard topics; monitor for rogue activity; plan broker update.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthorized wildcard subscribe/publish enables device discovery and spoofed control.
Immediate action required
- affected<= M6E_AI_1.00.000019
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.