CVE-2018-20336

HIGHNVD 7.57.5—

7.5

An issue was discovered in ASUSWRT 3.0.0.4.384.20308. There is a stack-based buffer overflow issue in parse_req_queries function in wanduck.c via a long string over UDP, which may lead to an information leak.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 62.0%
KEV: Not listed

Published

September 17, 2019

Last Modified

November 21, 2024

References (4)

cve@mitrehttps://starlabs.sg/advisories/18-20336/
cve@mitrehttps://www.asus.com/Networking/RT-AC1200G-plus/HelpDesk_BIOS/
af854a3a-2127-422b-91ae-364da2661108https://starlabs.sg/advisories/18-20336/
af854a3a-2127-422b-91ae-364da2661108https://www.asus.com/Networking/RT-AC1200G-plus/HelpDesk_BIOS/

Weakness Classification(1)

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

CWE-120Buffer Copy without Checking Size (Classic Buffer Overflow)

Data Freshness Timeline

(refreshed 8× in last 7d / 8× 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.

2026-05-27 14:28 UTCEG score recompute
2026-05-27 14:28 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-2018-20336?

CVE-2018-20336 is a high vulnerability published on September 17, 2019. An issue was discovered in ASUSWRT 3.0.0.4.384.20308. There is a stack-based buffer overflow issue in parsereqqueries function in wanduck.c via a long string over UDP, which may lead to an information leak.

When was CVE-2018-20336 disclosed?

CVE-2018-20336 was first published in the National Vulnerability Database on September 17, 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-2018-20336 actively exploited?

CVE-2018-20336 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 62.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-20336?

CVE-2018-20336 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2018-20336?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-20336, 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.

Dependency Blast Radius

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CVE-2018-20336

📅 Published

🔄 Last Modified

🔗 References (4)