CVE-2026-16843: Hikvision Products RCE Vulnerability

CVE-2026-16843 Overview

CVE-2026-16843 is an authenticated command execution vulnerability affecting select Hikvision networking products, including wireless access point (AP) devices. The flaw stems from insufficient input validation on data received by the affected devices. Attackers with valid credentials can send crafted packets containing malicious commands, causing the device to execute arbitrary operating system commands. The weakness is classified under CWE-78, OS Command Injection. Successful exploitation grants command execution in the context of the device firmware, which typically runs with elevated privileges.

Critical Impact
Authenticated attackers can execute arbitrary OS commands on affected Hikvision networking devices, resulting in full compromise of device confidentiality, integrity, and availability.

Affected Products

Select Hikvision Wireless AP products (see vendor advisory for specific models)
Additional Hikvision networking product lines as enumerated by the vendor
Firmware versions listed in the Hikvision Security Advisory

Discovery Timeline

2026-07-31 - CVE-2026-16843 published to NVD
2026-08-03 - Last updated in NVD database

Technical Details for CVE-2026-16843

Vulnerability Analysis

The vulnerability is a Command Injection flaw (CWE-78) in the packet-handling logic of affected Hikvision networking products. The device firmware accepts input from authenticated management sessions and passes portions of that input into shell or system-level command execution without adequate sanitization. An authenticated attacker who reaches the management interface over the network can inject shell metacharacters or additional command arguments into fields the firmware treats as trusted.

Because the vulnerable code paths run inside device firmware, executed commands inherit high privileges on the underlying embedded operating system. This enables the attacker to alter device configuration, pivot into the internal network the AP serves, capture wireless client traffic, or install persistent implants.

Root Cause

The root cause is missing or incomplete input validation on fields inside crafted management packets. The firmware concatenates attacker-controlled strings into commands that are then executed by a system shell. Standard defenses such as allow-list validation, argument arrays instead of shell strings, and escaping of metacharacters are absent on the affected code path.

Attack Vector

The attack vector is network-based but requires valid credentials for the device management interface. Once authenticated, the attacker sends a crafted packet whose payload contains injected commands appended to a legitimate parameter value. When the firmware processes the packet, the injected commands execute alongside the intended action. The EPSS score is 0.891% with a percentile of 55.99, reflecting moderate near-term exploitation likelihood.

No verified public exploit code is available. See the Hikvision Security Advisory for technical details on the affected packet structure and parameters.

Detection Methods for CVE-2026-16843

Indicators of Compromise

Unexpected outbound connections originating from Hikvision AP or networking device management IPs.
Configuration changes on affected devices that were not initiated by an authorized administrator.
Unusual authenticated management sessions from IP addresses outside normal administrative ranges.
Presence of new processes, cron entries, or startup scripts on device firmware where inspection is possible.

Detection Strategies

Inspect management-plane traffic to affected devices for parameters containing shell metacharacters such as ;, |, &&, or backticks.
Correlate successful device authentication events with subsequent configuration or firmware anomalies.
Alert on authentication attempts to Hikvision management interfaces from unexpected network segments.

Monitoring Recommendations

Forward device syslog and authentication logs to a centralized SIEM for long-term retention and correlation.
Baseline normal administrative traffic patterns and alert on deviations, including off-hours logins.
Monitor for unusual DNS resolutions or command-and-control beacons originating from network infrastructure segments.

How to Mitigate CVE-2026-16843

Immediate Actions Required

Apply the firmware updates published in the Hikvision Security Advisory as soon as available for the affected model.
Restrict access to device management interfaces to a dedicated, isolated management VLAN.
Rotate all administrative credentials on affected devices and remove any default or shared accounts.
Audit recent administrative activity for signs of unauthorized configuration changes.

Patch Information

Hikvision has published a security advisory covering the affected wireless AP and networking products. Refer to the Hikvision Security Advisory for the current list of fixed firmware versions and download links. Apply the vendor-supplied firmware appropriate to each device model.

Workarounds

Block access to device management ports from untrusted networks using upstream firewall rules.
Enforce strong, unique passwords and enable any available multi-factor or IP allow-list controls for administrative logins.
Disable remote management over WAN interfaces where operationally feasible until patched firmware is applied.

bash

# Example: restrict Hikvision device management to a management subnet
# Replace 10.10.50.0/24 with your management network and 192.0.2.10 with the device IP
iptables -A FORWARD -s 10.10.50.0/24 -d 192.0.2.10 -p tcp --dport 443 -j ACCEPT
iptables -A FORWARD -d 192.0.2.10 -p tcp --dport 443 -j DROP
iptables -A FORWARD -d 192.0.2.10 -p tcp --dport 80 -j DROP