CVE-2026-50085: The Aqara Board service (op-test.aqara.com) accepts arbitrary MQTT command payloads, and forwards them to the

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HIGH 8.6REMOTEDOWNGRADE

CVE-2026-50085 is a high-severity flaw (CVSS 8.6) affecting board service. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Aqara Board service (op-test.aqara.com) accepts arbitrary MQTT command payloads, and forwards them to the platfom's HiveMQ broker without authentication. This is an instance of "CWE-306: Missing Authentication for Critical Function" and has an estimated CVSS ofCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L (8.6 High). When combined with CVE-2026-50082, CVE-50083, and CVE-50084, this can lead to a fully unauthenticated, remote takeover of affect

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-306
Published	2026-06-12
Last modified	2026-10-26

Publisher (CNA): runZero · Vendor: aqara

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-12 16:16 UTCPublished CVE record published
2026-10-26 11:10 UTCUpdated Record last modified

aqara board service DOWNGRADE

Affected: 2026-04-20

Fixed in: no fixed release known

Safe to downgrade to: a release before 2026-04-20

1. Check installed version

apt-cache policy board-service || rpm -q board-service || board-service --version

2. No fixed release: DOWNGRADE to a release before 2026-04-20 (Debian / Ubuntu)

apt-cache madison board-service sudo apt install board-service=<VERSION_BEFORE_2026-04-20> sudo apt-mark hold board-service

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list board-service sudo dnf downgrade board-service-<VERSION_BEFORE_2026-04-20> sudo dnf versionlock add board-service

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-50085?

board service: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-50085 being exploited?

CVE-2026-50085 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-50085 affect?

CVE-2026-50085 affects board service. Severity is high (CVSS 8.6). The Aqara Board service (op-test.aqara.com) accepts arbitrary MQTT command payloads, and forwards them to the platfom's HiveMQ broker without authentication. This is an instance of "CWE-306: Missing Authentication for Critical Function" and

How urgent is CVE-2026-50085?

Priority 49/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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