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CVE-2018-20336

24
FAUCET Score

CVE-2018-20336 is a stack-based buffer overflow vulnerability found in the parse_req_queries function of wanduck.c within ASUSWRT firmware version 3.0.0.4.384.20308, affecting ASUS RT-AC68U routers. This flaw can be triggered by sending a long string over UDP, potentially leading to an information leak. With a CVSS v3.1 score of 7.5 (High), it can be exploited remotely over the network with low attack complexity and no user interaction, but only results in confidentiality impact. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
3.0.0.4.384.20308CPE matchmatch criteria
cpe:2.3:o:asus:asuswrt-merlin:3.0.0.4.384.20308:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.00%
Probability of exploitation in next 30 days
EPSS Percentile
78.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0200 is in the 62nd percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

starlabs.sg / advisories/18-20336
ExploitThird Party Advisory
asus.com / Networking/RT-AC1200G-plus/HelpDesk_BIOS