CVE-2026-65198 Huawei Default SNMPv3 USM key
Attackers can use hardcoded SNMPv3 keys to authenticate and decrypt traffic, gaining full administrative control over Huawei openUBMC devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-65198?
CVE-2026-65198 is a high-severity vulnerability in Huawei openUBMC, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-321
Which versions are affected by CVE-2026-65198?
How do I fix CVE-2026-65198?
No fix has been published for CVE-2026-65198 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-65198 being exploited?
There is no known exploitation of CVE-2026-65198 in the wild and no public exploit code.
Sources
Also known as GHSA-5754-6w67-33hx.