How severe is CVE-2017-2721?

CVE-2017-2721 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2017-2721 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-2721?

CVE-2017-2721 primarily affects Huawei Berlin-l21 Firmware. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-2721?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-2721 published?

CVE-2017-2721 was published on 2017-11-22 and last updated on 2026-06-17.

CVE-2017-2721

CVE-2017-2721 is a medium-severity vulnerability in Huawei Berlin-l21 Firmware with a CVSS 3.x base score of 4.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Medium (CVSS 3.x base score 4.6)
CVSS v2: 2.1
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Huawei Berlin-l21 Firmware
Published: 2017-11-22
Last modified: 2026-06-17

Description

Some Huawei smart phones with software Berlin-L21C10B130,Berlin-L21C185B133,Berlin-L21HNC10B131,Berlin-L21HNC185B140,Berlin-L21HNC432B151,Berlin-L22C636B160,Berlin-L22HNC636B130,Berlin-L22HNC675B150CUSTC675D001,Berlin-L23C605B131,Berlin-L24HNC567B110,FRD-L02C432B120,FRD-L02C635B130,FRD-L02C675B170CUSTC675D001,FRD-L04C567B162,FRD-L04C605B131,FRD-L09C10B130,FRD-L09C185B130,FRD-L09C432B131,FRD-L09C636B130,FRD-L14C567B162,FRD-L19C10B130,FRD-L19C432B131,FRD-L19C636B130 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 login the configuration flow by Swype Keyboard and can perform some operations to update the Google account. As a result, the FRP function is bypassed.

Frequently asked questions

What is CVE-2017-2721?: Some Huawei smart phones with software Berlin-L21C10B130,Berlin-L21C185B133,Berlin-L21HNC10B131,Berlin-L21HNC185B140,Berlin-L21HNC432B151,Berlin-L22C636B160,Berlin-L22HNC636B130,Berlin-L22HNC675B150CUSTC675D001,Berlin-L23C605B131,Berlin-L24HNC567B110,FRD-L02C432B120,FRD-L02C635B130,FRD-L02C675B170CUSTC675D001,FRD-L04C567B162,FRD-L04C605B131,FRD-L09C10B130,FRD-L09C185B130,FRD-L09C432B131,FRD-L09C636B130,FRD-L14C567B162,FRD-L19C10B130,FRD-L19C432B131,FRD-L19C636B130 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 login the configuration flow by Swype Keyboard and can perform some operations to update the Google account. As a result, the FRP function is bypassed.
How severe is CVE-2017-2721?: CVE-2017-2721 has a CVSS 3.x base score of 4.6, rated medium severity. It is exploitable over physical access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2017-2721 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-2721?: CVE-2017-2721 primarily affects Huawei Berlin-l21 Firmware. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-2721?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-2721 published?: CVE-2017-2721 was published on 2017-11-22 and last updated on 2026-06-17.

References

http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20170920-01-frpbypass-en

Affected products (23)

cpe:2.3:o:huawei:berlin-l21_firmware:berlin-l21c10b130:*:*:*:*:*:*:*
cpe:2.3:o:huawei:berlin-l21_firmware:berlin-l21c185b133:*:*:*:*:*:*:*
cpe:2.3:o:huawei:berlin-l21hn_firmware:berlin-l21hnc10b131:*:*:*:*:*:*:*
cpe:2.3:o:huawei:berlin-l21hn_firmware:berlin-l21hnc185b140:*:*:*:*:*:*:*
cpe:2.3:o:huawei:berlin-l21hn_firmware:berlin-l21hnc432b151:*:*:*:*:*:*:*
cpe:2.3:o:huawei:berlin-l22_firmware:berlin-l22c636b160:*:*:*:*:*:*:*
cpe:2.3:o:huawei:berlin-l22hn_firmware:berlin-l22hnc636b130:*:*:*:*:*:*:*
cpe:2.3:o:huawei:berlin-l22hn_firmware:berlin-l22hnc675b150custc675d001:*:*:*:*:*:*:*
cpe:2.3:o:huawei:berlin-l23_firmware:berlin-l23c605b131:*:*:*:*:*:*:*
cpe:2.3:o:huawei:berlin-l24hn_firmware:berlin-l24hnc567b110:*:*:*:*:*:*:*
cpe:2.3:o:huawei:frd-l02_firmware:frd-l02c432b120:*:*:*:*:*:*:*
cpe:2.3:o:huawei:frd-l02_firmware:frd-l02c635b130:*:*:*:*:*:*:*
cpe:2.3:o:huawei:frd-l02_firmware:frd-l02c675b170custc675d001:*:*:*:*:*:*:*
cpe:2.3:o:huawei:frd-l04_firmware:frd-l04c567b162:*:*:*:*:*:*:*
cpe:2.3:o:huawei:frd-l04_firmware:frd-l04c605b131:*:*:*:*:*:*:*
cpe:2.3:o:huawei:frd-l09_firmware:frd-l09c10b130:*:*:*:*:*:*:*
cpe:2.3:o:huawei:frd-l09_firmware:frd-l09c185b130:*:*:*:*:*:*:*
cpe:2.3:o:huawei:frd-l09_firmware:frd-l09c432b131:*:*:*:*:*:*:*
cpe:2.3:o:huawei:frd-l09_firmware:frd-l09c636b130:*:*:*:*:*:*:*
cpe:2.3:o:huawei:frd-l14_firmware:frd-l14c567b162:*:*:*:*:*:*:*
cpe:2.3:o:huawei:frd-l19_firmware:frd-l19c10b130:*:*:*:*:*:*:*
cpe:2.3:o:huawei:frd-l19_firmware:frd-l19c432b131:*:*:*:*:*:*:*
cpe:2.3:o:huawei:frd-l19_firmware:frd-l19c636b130:*:*:*:*:*:*:*

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