CVE-2023-52163

Digiever DS-2105 Pro network video recorders (firmware version 3.1.0.71-11 is cited in the advisory) expose a time_tzsetup.cgi endpoint that fails to properly enforce authorization (CWE-862), and crafted requests to it trigger operating-system command injection; the CVSS 8.8 score reflects network reachability, low privilege requirements, and no user interaction. Successful exploitation yields command execution on the device with high impact on confidentiality, integrity, and availability — effectively remote code execution, which makes these NVRs attractive targets for IoT botnets such as the RondoDox campaign and the Mirai-variant ShadowV2. Only organizations still running the DS-2105 Pro (or DS-2105 Pro+) are affected, and because the vendor no longer supports the product, unpatched internet-facing units are the primary risk. Exploitation is confirmed in the wild: CISA added the flaw to the Known Exploited Vulnerabilities catalog on 2025-12-22, EPSS puts the 30-day exploitation probability at 96.9%, and ransomware use is currently unknown.

What to do: Because the product is end-of-life, check with Digiever for any final firmware update and apply it per vendor instructions; if no patch or mitigation is available, the CISA KEV required action is to discontinue use of the device, and federal agencies must follow BOD 22-01 timelines. In the interim, remove direct internet exposure of the NVR's web interface (restrict via firewall or place behind VPN) and hunt for compromise by looking for suspicious requests to time_tzsetup.cgi and unexpected outbound connections consistent with botnet infection.