CVE-2026-65198
Huawei's openUBMC ships a default SNMPv3 USM key that uses one value for both authentication and…
- Risk score
- 58/100
- CVSS
- 8.6 v3.1
- Exploit chance (30 days)
- 0.2%
- Published
- 13 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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/bui…
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 8.6 high
- Remotely exploitable without logging in
References
Original description
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.
Last activity 13 Oct 2026. Patch Forecast updates every hour.