A720R
Monthly
Memory corruption in TOTOLINK A720R router firmware 4.1.5cu.630_B20250509 allows authenticated remote attackers to trigger a buffer overflow in the MAC filtering subsystem, with potential for arbitrary code execution. The vulnerable path is the `setMacFilterRules` function within `cstecgi.cgi`, exploitable by sending a crafted `desc` argument over the network. A public proof-of-concept is available on GitHub; no CISA KEV listing exists at time of analysis, but the combination of network reachability and published exploit code meaningfully elevates real-world risk.
Memory corruption in TOTOLINK A720R router firmware 4.1.5cu.630_B20250509 allows authenticated remote attackers to trigger a buffer overflow in the MAC filtering subsystem, with potential for arbitrary code execution. The vulnerable path is the `setMacFilterRules` function within `cstecgi.cgi`, exploitable by sending a crafted `desc` argument over the network. A public proof-of-concept is available on GitHub; no CISA KEV listing exists at time of analysis, but the combination of network reachability and published exploit code meaningfully elevates real-world risk.