VulnerabilityModified

CVE-2021-21723

Some ZTE products have a DoS vulnerability.

HIGH 7.5EPSS 1.19%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.19%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

Some ZTE products have a DoS vulnerability. Due to the improper handling of memory release in some specific scenarios, a remote attacker can trigger the vulnerability by performing a series of operations, resulting in memory leak, which may eventually lead to device denial of service. This affects: ZXR10 9904, ZXR10 9908, ZXR10 9916, ZXR10 9904-S, ZXR10 9908-S; all versions up to V1.01.10.B12.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 1.19% probability · 66th percentile
CISA KEV: Not listed
Weakness: CWE-401
Affected: zte/zxr10 9904 firmware · zte/zxr10 9908 firmware · zte/zxr10 9916 firmware · zte/zxr10 9904-s firmware · zte/zxr10 9908-s firmware
Source: psirt@zte.com.cn

References

http://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014424Vendor Advisory
http://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014424Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.