CVE-2018-15556

CRITICALNVD 9.89.8—

9.8

The Quantenna WiFi Controller on Telus Actiontec WEB6000Q v1.1.02.22 allows login with root level access with the user "root" and an empty password by using the enabled onboard UART headers.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 84.8%
KEV: Not listed

Published

June 27, 2019

Last Modified

November 21, 2024

References (6)

cve@mitrehttp://packetstormsecurity.com/files/153262/Telus-Actiontec-WEB6000Q-Privilege-Escalation.html
cve@mitrehttp://seclists.org/fulldisclosure/2019/Jun/1
cve@mitrehttp://seclists.org/fulldisclosure/2019/Jun/1
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/153262/Telus-Actiontec-WEB6000Q-Privilege-Escalation.html
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2019/Jun/1
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2019/Jun/1

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-287Improper Authentication

Data Freshness Timeline

(refreshed 10× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:10 UTCepss_batch
2026-06-04 13:10 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
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2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 18:00 UTCEG score recompute
2026-05-27 18:00 UTCGHSA enrichment
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2018-15556?

CVE-2018-15556 is a critical vulnerability published on June 27, 2019. The Quantenna WiFi Controller on Telus Actiontec WEB6000Q v1.1.02.22 allows login with root level access with the user "root" and an empty password by using the enabled onboard UART headers.

When was CVE-2018-15556 disclosed?

CVE-2018-15556 was first published in the National Vulnerability Database on June 27, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-15556 actively exploited?

CVE-2018-15556 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 84.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-15556?

CVE-2018-15556 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2018-15556?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-15556, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2018-15556

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-15556?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)