CVE-2021-37273

7.5 highEPSS 1.0%

High (7.5) in chinatelecom epon tianyi gateway zxhn f450 firmware. EPSS 1.0% chance of exploitation in the next 30 days.

A Denial of Service issue exists in China Telecom Corporation EPON Tianyi Gateway ZXHN F450(EPON ONU) 3.0. Tianyi Gateway is a hardware terminal of "Optical Modem Smart Router." Attackers can use this vulnerability to restart the device multiple times.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 1.0% chance of exploitation in the next 30 days; higher than 62% of CVEs (scores of 2026-10-31)
Published: 2021-09-28
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

chinatelecom:epon_tianyi_gateway_zxhn_f450_firmware

References

https://www.cnvd.org.cn/flaw/show/2958526
https://www.cnvd.org.cn/flaw/show/2958526

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