CVE-2021-39999: Huawei ESE620X Vess Firmware

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

There is a buffer overflow vulnerability in eSE620X vESS V100R001C10SPC200 and V100R001C20SPC200. An attacker can exploit this vulnerability by sending a specific message to the target device due to insufficient validation of packets. Successful exploit could cause a denial of service condition.

Affected products

• Huawei ESE620X Vess Firmware: version v100r001c10spc200 only; version v100r001c20spc200 only

Published 2022-07-12. Last modified 2026-06-17.