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CVE-2023-20118 is a command injection vulnerability in the web-based management interface of Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 routers. Improper validation of user input in incoming HTTP packets allows a remote attacker with valid administrative credentials to submit a crafted HTTP request and execute arbitrary commands with root-level privileges. Successful exploitation can also expose unauthorized data. The vulnerability has been exploited in campaigns deploying webshells, PolarEdge backdoors, and ViciousTrap traffic-redirection tooling.
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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.
37 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Cisco Small Business router command injection vulnerability leveraged in botnet activity against edge devices.
A critical vulnerability in Cisco Small Business RV-series routers exploited to compromise thousands of devices and build a global honeypot-like network (ViciousTrap).
A vulnerability affecting Cisco routers that attackers exploited to achieve remote code execution and deploy a web shell or the PolarEdge Backdoor. The report describes exploitation observed in January and February 2025; its main focus is the backdoor's technical capabilities.
A specific vulnerability (CVE-2023-20118) used by the PolarEdge-associated infrastructure (via 111.119.223.196) as an initial access/exploitation vector to spread a malicious shell script ("s"), which then facilitated further payload delivery in the described campaign.
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.