CVE-2018-5721 is a stack-based buffer overflow in the ej_update_variables function within the web server of ASUS routers running the asuswrt-merlin firmware. This vulnerability allows authenticated attackers to execute arbitrary code by sending a crafted request that updates a setting, specifically by exploiting an unchecked length for the "action_script" variable when it contains "_wan_if". With a CVSS score of 8.8 (High), it presents a significant risk due to its network-based attack vector, low attack complexity, and potential for complete compromise of confidentiality, integrity, and availability. There is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 382.1_2CPE matchmatch criteria | cpe:2.3:o:asuswrt-merlin:asuswrt-merlin:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub 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 records are not available for this CVE.