In Weidmueller Industrial WLAN devices in multiple versions an exploitable format string vulnerability exists in the iw_console conio_writestr functionality. A specially crafted time server entry can cause an overflow of the time server buffer, resulting in remote code execution. An attacker can send commands while authenticated as a low privilege user to trigger this vulnerability.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-33535
• https://cert.vde.com/en-us/advisories/vde-2021-026