What is CVE-2021-38278?

CVE-2021-38278 is a critical-severity vulnerability in Tendacn Ac10, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-03-23.

How severe is CVE-2021-38278?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Tendacn Ac10

CVE-2021-38278

Tenda AC10-1200 v15.03.06.23_EN was discovered to contain a buffer overflow via the urls parameter in the saveParentControlInfo function.

Vulnerability class: Buffer Overflow

Published 2022-03-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.6th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Tendacn Ac10
Tendacn Ac10 Firmware — versions 15.03.06.23

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

noob3xploiter.medium.com/hacking-the-tenda-ac10-1200-router-part-2-strcpy-buffe… (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2021-38278?: CVE-2021-38278 is a critical-severity vulnerability in Tendacn Ac10, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2022-03-23.
How severe is CVE-2021-38278?: Critical severity. CVSS v3 base score is 9.8 out of 10.