What is CVE-2018-15557?

CVE-2018-15557 is a high-severity vulnerability in Actiontec Web6000q, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2019-06-27.

How severe is CVE-2018-15557?

High severity. CVSS v3 base score is 8.8 out of 10.

Privilege escalation in Actiontec Web6000q

CVE-2018-15557

An issue was discovered in the Quantenna WiFi Controller on Telus Actiontec WEB6000Q v1.1.02.22 devices. An attacker can statically set his/her IP to anything on the 169.254.1.0/24 subnet, and obtain root access by connecting to 169.254.1.2 port 23 with telnet/netcat.

Vulnerability class: Privilege Escalation

Published 2019-06-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.033 (87.9th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000

Affected products

Actiontec Web6000q
Actiontec Web6000q Firmware — versions 1.1.02.22

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

seclists.org/fulldisclosure/2019/Jun/2 (mailing-list, Mailing List, Third Party Advisory)
packetstormsecurity.com/files/153262/Telus-Actiontec-WEB6000Q-Privilege-Escalat… (Exploit, VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2018-15557?: CVE-2018-15557 is a high-severity vulnerability in Actiontec Web6000q, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2019-06-27.
How severe is CVE-2018-15557?: High severity. CVSS v3 base score is 8.8 out of 10.