Is CVE-2026-9266 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-9266 being exploited in the wild.

How severe is CVE-2026-9266?

Informational severity, with a CVSS score of 7, published 12 June 2026.

Which products and versions are affected?

Moxa UC-1200A Series OS image v1.4 and earlier (MIL3); v4.0.0 and earlier (MIL4); Moxa UC-2200A Series OS image v1.4 and earlier (MIL3); v4.0.0 and earlier (MIL4); Moxa UC-3400A Series OS image v1.2 and earlier (MIL3); v4.0.0 and earlier (MIL4); Moxa UC-4400A Series OS image v1.3 and earlier; and 5 more.

Is there a fix for CVE-2026-9266?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-9266 attacked?

It is attacked with physical access, in an operating system.

Am I affected by CVE-2026-9266?

Check whether you run Moxa UC-1200A Series OS image, Moxa UC-2200A Series OS image, Moxa UC-3400A Series OS image or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-9266: Moxa Industrial Computers missing cryptographic step in TPM communication

CVE-2026-9266 · Severity: info · CVSS 7 · Published 2026-06-12

A security flaw in Moxa industrial computers and controllers could allow an attacker with physical access to bypass disk encryption. By opening the device and monitoring internal hardware communications, an attacker can retrieve the encryption keys used to protect stored data. This could lead to a full compromise of the information stored on the device, though it requires specialized equipment and direct physical tampering.

Vendors: Moxa.

Quick answers

Is CVE-2026-9266 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-9266 being exploited in the wild.
How severe is CVE-2026-9266?: Informational severity, with a CVSS score of 7, published 12 June 2026.
Which products and versions are affected?: Moxa UC-1200A Series OS image v1.4 and earlier (MIL3); v4.0.0 and earlier (MIL4); Moxa UC-2200A Series OS image v1.4 and earlier (MIL3); v4.0.0 and earlier (MIL4); Moxa UC-3400A Series OS image v1.2 and earlier (MIL3); v4.0.0 and earlier (MIL4); Moxa UC-4400A Series OS image v1.3 and earlier; and 5 more.
Is there a fix for CVE-2026-9266?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-9266 attacked?: It is attacked with physical access, in an operating system.
Am I affected by CVE-2026-9266?: Check whether you run Moxa UC-1200A Series OS image, Moxa UC-2200A Series OS image, Moxa UC-3400A Series OS image or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A Missing Required Cryptographic Step (CWE-325) exists in Moxa's embedded Linux firmware (MIL) due to an incomplete remediation of a previous vulnerability. While TPM2 parameter encryption was introduced as a fix, an omission in the authorization session configuration renders this encryption ineffective. An attacker with invasive physical access can sniff the SPI bus to capture TPM communications and derive the LUKS plaintext disk encryption key. This allows for the full decryption of the disk volume. The attack is local/physical only and cannot be performed over a network. Moxa has released updated firmware images and kernel packages to address the configuration error.

Affected products

Moxa UC-1200A Series OS image (MIL3/MIL4) v1.4 and earlier (MIL3); v4.0.0 and earlier (MIL4)
Moxa UC-2200A Series OS image (MIL3/MIL4) v1.4 and earlier (MIL3); v4.0.0 and earlier (MIL4)
Moxa UC-3400A Series OS image (MIL3/MIL4) v1.2 and earlier (MIL3); v4.0.0 and earlier (MIL4)
Moxa UC-4400A Series OS image (MIL3) v1.3 and earlier
Moxa UC-8200 Series OS image (MIL3) v1.5 and earlier
Moxa V1200 Series OS image (MIL3) v1.2.0 and earlier
Moxa V3200 Series OS image (MIL3) v1.1 and earlier
Moxa V3400 Series OS image (MIL3) v1.1 and earlier
Moxa V2406C Series OS image (MIL2) v1.2 and earlier

Timeline

2026-06-12: advisory: Moxa published security advisory MPSA-266240
2026-06-12: disclosed: CVE-2026-9266 published

References

https://www.moxa.com/en/support/product-support/security-advisory/mpsa-266240-cve-2026-9266-missing-required-cryptographic-step-vulnerability-in-industrial-computers

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