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CVE-2023-39780 is an OS command injection vulnerability affecting ASUS RT-AX55 routers running firmware version 3.0.0.4.386.51598. An authenticated attacker can inject operating system commands through the /start_apply.htm endpoint via the qos_bw_rulelist parameter. Successful exploitation allows attacker-supplied input to be interpreted by the underlying system shell rather than treated as data, resulting in arbitrary command execution on the router. The issue has been described as related to similar command injection flaws in ASUS token-handling modules tracked separately as CVE-2023-41345, CVE-2023-41346, CVE-2023-41347, and CVE-2023-41348.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
27 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A specific CVE for which exploit code is implemented in native C inside TuxBot, but the exploit engine is dead code and never called at runtime in the analyzed version.
Unknown (vulnerability exploited by the AyySSHush/ViciousTrap botnet; mentioned as a shared/overlapping vulnerability with the WrtHug cluster).
Major command injection vulnerability in ASUS WRT routers, reported as used in both Operation WrtHug and the earlier AyySSHush campaign.
A known Asus router vulnerability used post-compromise to run arbitrary system commands (command execution) on affected devices, enabling attackers to establish persistence (e.g., SSH access/backdoor).
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.