What is CVE-2015-9550?

CVE-2015-9550 is a high-severity vulnerability in Totolink A850r-V1, classified under Exposure of Resource to Wrong Sphere. CVSS score: 7.5/10. Published 2020-11-24.

How severe is CVE-2015-9550?

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

Vulnerability in Totolink A850r-V1

CVE-2015-9550

An issue was discovered on TOTOLINK A850R-V1 through 1.0.1-B20150707.1612 and F1-V2 through 1.1-B20150708.1646 devices. By sending a specific hel,xasf packet to the WAN interface, it is possible to open the web management interface on the WAN interface.

Published 2020-11-24 · 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: 0.016 (74.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-668 — Exposure of Resource to Wrong Sphere

References

pierrekim.github.io/blog/2015-07-16-backdoor-and-RCE-found-in-8-TOTOLINK-produc… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2015-9550?: CVE-2015-9550 is a high-severity vulnerability in Totolink A850r-V1, classified under Exposure of Resource to Wrong Sphere. CVSS score: 7.5/10. Published 2020-11-24.
How severe is CVE-2015-9550?: High severity. CVSS v3 base score is 7.5 out of 10.