A Denial of Service issue exists in China Telecom Corporation EPON Tianyi Gateway ZXHN…
Priority LOW 35Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.00978 62nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:chinatelecom:epon_tianyi_gateway_zxhn_f450_firmware:3.0:*:*:*:*:*:*:* | 3.0 | Vulnerable | Chinatelecom |
| cpe:2.3:h:chinatelecom:epon_tianyi_gateway_zxhn_f450:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Chinatelecom |
- cpe:2.3:o:chinatelecom:epon_tianyi_gateway_zxhn_f450_firmware:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·Chinatelecom
- cpe:2.3:h:chinatelecom:epon_tianyi_gateway_zxhn_f450:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Chinatelecom
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-37273
- 2026-10-03 Alias added: GHSA-gq9p-fgf8-xxr3
References
Sources
- CVE-2021-37273 · CVE Program
- CVE-2021-37273 · NVD
- FIRST EPSS
- GHSA-gq9p-fgf8-xxr3 · GitHub Advisory Database · CC BY 4.0
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