What is CVE-2021-47802?

CVE-2021-47802 is a high-severity vulnerability in Shenzhen Tenda Technology Co.,ltd. D151 & D301, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-01-21.

How severe is CVE-2021-47802?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Shenzhen Tenda Technology Co.,ltd. D151 & D301

CVE-2021-47802

Tenda D151 and D301 routers contain an unauthenticated configuration download vulnerability that allows remote attackers to retrieve router configuration files. Attackers can send a request to /goform/getimage endpoint to download configuration data including admin credentials without authentication.

Vulnerability class: Broken Authentication

Published 2026-01-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.007 (51.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.001

Affected products

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

www.exploit-db.com/exploits/49782 (Exploit, exploit)
www.tendacn.com/us/ (Product, product)
www.vulncheck.com/advisories/tenda-d-d-configuration-download (Broken Link, third-party-advisory)

Frequently asked questions

What is CVE-2021-47802?: CVE-2021-47802 is a high-severity vulnerability in Shenzhen Tenda Technology Co.,ltd. D151 & D301, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-01-21.
How severe is CVE-2021-47802?: High severity. CVSS v3 base score is 7.5 out of 10.