CVE-2018-7939

Severity: medium (CVSS 4.6 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-09-12 · updated 2026-06-17

Description

Huawei smart phones G9 Lite, Honor 5A, Honor 6X, Honor 8 with the versions before VNS-L53C605B120CUSTC605D103, the versions before CAM-L03C605B143CUSTC605D008, the versions before CAM-L21C10B145, the versions before CAM-L21C185B156, the versions before CAM-L21C223B133, the versions before CAM-L21C432B210, the versions before CAM-L21C464B170, the versions before CAM-L21C636B245, the versions before Berlin-L21C10B372, the versions before Berlin-L21C185B363, the versions before Berlin-L21C464B137, the versions before Berlin-L23C605B161, the versions before FRD-L09C10B387, the versions before FRD-L09C185B387, the versions before FRD-L09C432B398, the versions before FRD-L09C636B387, the versions before FRD-L19C10B387, the versions before FRD-L19C432B399, the versions before FRD-L19C636B387 have a Factory Reset Protection (FRP) bypass security vulnerability. When re-configuring the mobile phone using the factory reset protection (FRP) function, an attacker can disable the boot wizard by enable the talkback function. As a result, the FRP function is bypassed.

Affected products

Huawei G9 Lite Firmware: before vns-l53c605b120custc605d103 — fixed in vns-l53c605b120custc605d103
Huawei Technologies Co., Ltd. Honor 5A: before cam-l21c464b170 — fixed in cam-l21c464b170
Huawei Honor 5A Firmware: before cam-l03c605b143custc605d008; before cam-l21c10b145; before cam-l21c185b156; before cam-l21c223b133; before cam-l21c432b210; before cam-l21c636b245 — fixed in cam-l03c605b143custc605d008, cam-l21c10b145, cam-l21c185b156, cam-l21c223b133, cam-l21c432b210, cam-l21c636b245
Huawei Technologies Co., Ltd. Honor 6X: before berlin-l21c10b372; before berlin-l21c185b363; before berlin-l21c464b137; before berlin-l23c605b161 — fixed in berlin-l21c10b372, berlin-l21c185b363, berlin-l21c464b137, berlin-l23c605b161
Huawei Technologies Co., Ltd. Honor 8: before frd-l09c10b387; before frd-l09c185b387; before frd-l09c432b398; before frd-l09c636b387; before frd-l19c10b387; before frd-l19c432b399 — fixed in frd-l09c10b387, frd-l09c185b387, frd-l09c432b398, frd-l09c636b387, frd-l19c10b387, frd-l19c432b399

How to fix

Upgrade to a fixed version: Huawei G9 Lite Firmware vns-l53c605b120custc605d103; Huawei Technologies Co., Ltd. Honor 5A cam-l21c464b170; Huawei Honor 5A Firmware cam-l03c605b143custc605d008, cam-l21c10b145, cam-l21c185b156, cam-l21c223b133; Huawei Technologies Co., Ltd. Honor 6X berlin-l21c10b372, berlin-l21c185b363, berlin-l21c464b137, berlin-l23c605b161; Huawei Technologies Co., Ltd. Honor 8 frd-l09c10b387, frd-l09c185b387, frd-l09c432b398, frd-l09c636b387. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2018-7939 or the next vulnerability affects your stack