Moxa Linux devices hit by SSH keysign flaw
A privilege escalation vulnerability in the Linux kernel's SSH keysign component affects Moxa products, per a CERT-FR advisory.
Sourcecert.ssi.gouv.fr — open the original
What to check
- Applies to
- The 1 CVE named below. Whether you run an affected version is not assessed: check the versions the source lists.
- Exploitation
- A public exploit is recorded for CVE-2026-46333 (weaponized); no exploitation in the wild is recorded.
CERT-FR issued an advisory relaying a Moxa security bulletin (MPSA-267410) concerning CVE-2026-46333, a vulnerability affecting the ssh-keysign component in the Linux kernel as implemented in certain Moxa products. The flaw allows an attacker to achieve privilege escalation on affected systems.
No technical exploitation details, proof-of-concept, or evidence of in-the-wild attacks are included in the advisory. Affected organizations should consult Moxa's security bulletin for the specific list of impacted products and apply vendor-supplied patches once available.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0931
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