Hub M2 Firmware: Improper Certificate Validation
CVE-2025-65291 is a high-severity improper certificate validation vulnerability in Hub M2 Firmware from Aqara, with a CVSS 3.1 base score of 7.4 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Hub M2 Firmware versions: 4.3.6_0027. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.19% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Hub M2 Firmware you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Aqara | Hub M2 Firmware | 4.3.6_0027 | Not stated |
| Aqara | Hub M3 Firmware | 4.3.6_0025 | Not stated |
| Aqara | Camera Hub G3 Firmware | 4.1.9_0027 | Not stated |
Version data comes from NVD's product matching. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- HighSuccess depends on conditions outside the attacker's control.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by CISA (ADP).
Official description
Aqara Hub devices including Hub M2 4.3.6_0027, Hub M3 4.3.6_0025, Camera Hub G3 4.1.9_0027 fail to validate server certificates in TLS connections for discovery services and CoAP gateway communications, enabling man-in-the-middle attacks on device control and monitoring.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Certificate Validation
The product does not validate, or incorrectly validates, a certificate.
How developers prevent this class of flaw
- Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
- If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.
More Improper Certificate Validation vulnerabilities (CWE-295)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Technical write-ups (may include proof of concept)
- github.com/Chapoly1305/myCVEReports/blob/main/Aqara/CoAP-Certificate-Validation-Bypass.mdExploit, Third Party Advisory
Other vulnerabilities in Hub M2 Firmware
- 7.5 High severity
- 8.1 High severity
- 9.8 Critical severity
- 7.3 High severity
- 7.4 High severity
Recent Improper Certificate Validation vulnerabilities
- 9.1 Critical severity
- 8.1 High severity
- 7.4 High severity
- 7.5 High severity
- 8.3 High severity
- 7.5 High severity
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