What is CVE-2018-7561?

CVE-2018-7561 is a critical-severity vulnerability in Tenda Ac9, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-03-01.

How severe is CVE-2018-7561?

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

Buffer overflow in Tenda Ac9

CVE-2018-7561

Stack-based Buffer Overflow in httpd on Tenda AC9 devices V15.03.05.14_EN allows remote attackers to cause a denial of service or possibly have unspecified other impact.

Vulnerability class: Buffer Overflow

Published 2018-03-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.017 (76.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Tenda Ac9
Tendacn Ac9 Firmware — versions 15.03.05.14_en

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/VulDetailsPublication/Poc/tree/master/Tenda/AC9 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-7561?: CVE-2018-7561 is a critical-severity vulnerability in Tenda Ac9, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-03-01.
How severe is CVE-2018-7561?: Critical severity. CVSS v3 base score is 9.8 out of 10.