Huawei openUBMC up to 26.06 SNMPv3 USM Key Management default_password.lua hard-coded credentials

Summaryinfo

A vulnerability was found in Huawei openUBMC up to 26.06. It has been declared as very critical. The impacted element is an unknown function of the file manifest/build/customization/default_password.lua of the component SNMPv3 USM Key Management. Such manipulation leads to hard-coded credentials. This vulnerability is referenced as CVE-2026-65198. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Huawei openUBMC up to 26.06. Affected by this issue is some unknown processing of the file manifest/build/customization/default_password.lua of the component SNMPv3 USM Key Management. The manipulation with an unknown input leads to a hard-coded credentials vulnerability. Using CWE to declare the problem leads to CWE-798. The product contains hard-coded credentials, such as a password or cryptographic key, which it uses for its own inbound authentication, outbound communication to external components, or encryption of internal data. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Huawei's openUBMC ships a default SNMPv3 USM key that uses one value for both authentication and privacy. An attacker who holds the key (recoverable from the open-source build) can authenticate SNMPv3 to, and decrypt SNMPv3 traffic from, any unit that still carries the shipped key. The build customization `manifest/build/customization/default_password.lua` sets `AuthenticationKey == EncryptionKey == 7df2f29369e3ac3245b2c9d46b67a0ecd055197e41808a34ef325db2f6422581` for the iBMC product build, and the community seed `account/manufacture/default_password.lua` sets both to `7a2f5b86f20233ec7b7bef49643fbf34d86d0cbf6f1f8f5c52d4f30d4536938b`. These are shipped constants, not per-unit values, and they are not rotated by the Administrator password reset, so they survive account provisioning. This is especially dangerous considering that SNMP access is mapped to full device administration privileges, including system reset and firmware upgrades.

The advisory is available at runzero.com. This vulnerability is handled as CVE-2026-65198 since 07/21/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 10/13/2026). This vulnerability is assigned to T1110.001 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Huawei

Name

• openUBMC

Version

• 26.06

License

• commercial

Website

• Vendor: https://www.huawei.com/

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