Hard-coded JWT Signing Key Authentication Bypass in Moxa Network Security Appliances and Routers
CVE-2025-6950 is a critical use of hard-coded credentials vulnerability in Moxa network security appliances and routers. The affected devices use a hard-coded secret key to sign JSON Web Tokens (JWTs) used for authentication. Because the signing key is embedded and not unique or securely managed, an unauthenticated remote attacker can generate forged JWTs that are accepted as valid by the device. This allows authentication bypass and impersonation of arbitrary users, including administrative users. The issue affects Moxa product lines reported as versions prior to v3.21, including EDF-G1002-BP, EDR-8010, EDR-G9010, NAT-102, NAT-108, TN-4900, and OnCell G4302-LTE4. The vulnerability is rated CVSS v4.0 9.9 (Critical) and can lead to complete compromise of the affected device.
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Recent activity
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Hardcoded JWT signing key in Moxa network security devices/routers enabling token forgery and authentication bypass if the key is recovered.
A vulnerability listed as trending; no technical details provided in the content.
Use of hard-coded credentials/secret key for JWT signing in Moxa network security appliances and routers, enabling unauthenticated JWT forgery to bypass authentication and impersonate users, potentially leading to full device compromise.
Une des multiples vulnérabilités affectant des produits Moxa, pouvant contribuer à une élévation de privilèges, une atteinte à la confidentialité des données et/ou un contournement de la politique de sécurité (détails techniques non fournis dans l'avis CERT-FR).
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.