CVE-2018-20336

Name: CVE-2018-20336
Creator: NVD / NIST
Published: 2019-09-17T16:15:10.747+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.00%

Last modified Jun 17, 2026

CVE-2018-20336 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 2.00% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

2.00%

78.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions
Asus	Asuswrt-Merlin	3.0.0.4.384.20308

References

https://starlabs.sg/advisories/18-20336/Exploit, Third Party Advisory
https://www.asus.com/Networking/RT-AC1200G-plus/HelpDesk_BIOS/
https://starlabs.sg/advisories/18-20336/Exploit, Third Party Advisory
https://www.asus.com/Networking/RT-AC1200G-plus/HelpDesk_BIOS/

Timeline

Published: Sep 17, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-20336?

How severe is CVE-2018-20336?

CVE-2018-20336 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.00% probability of exploitation in the next 30 days.

How do I fix CVE-2018-20336?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-20336?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST