CVE-2026-88273 Overview
CVE-2026-88273 is a command injection vulnerability in the GeoVision GV-LPC2211 license plate capture device running firmware version V1.13. An administrator-controlled Point-to-Point Protocol over Ethernet (PPPoE) username escapes a sourced shell configuration assignment and executes arbitrary commands as root. The flaw is categorized under [CWE-78] (OS Command Injection) and stems from unsafe handling of configuration input consumed by a shell script.
Critical Impact
An authenticated administrator can achieve arbitrary command execution as root on the device, resulting in full compromise of the embedded system.
Affected Products
- GeoVision GV-LPC2211 firmware V1.13
Discovery Timeline
- 2026-09-10 - CVE-2026-88273 published to the National Vulnerability Database (NVD)
- 2026-09-10 - Last updated in NVD database
Technical Details for CVE-2026-88273
Vulnerability Analysis
The GV-LPC2211 exposes PPPoE configuration to administrators through its management interface. The device stores the supplied PPPoE username in a shell configuration file that a startup or connection script later sources. Because the assignment is not quoted or sanitized, shell metacharacters within the username terminate the assignment and introduce attacker-controlled commands.
When the script is sourced, the injected payload runs in the context of the shell interpreter that owns the network configuration process. On the GV-LPC2211, that interpreter runs as root, giving the attacker full control of the underlying Linux-based firmware.
Exploitation requires administrator credentials, which raises the required privileges but does not eliminate risk. Compromised admin accounts, shared credentials, or insider misuse convert a configuration field into a persistent root shell primitive.
Root Cause
The underlying defect is unsafe interpolation of user-controlled data into a shell configuration file consumed by source (or .). Without proper quoting or input validation, characters such as ;, `, $(), or newlines break out of the variable assignment. This pattern is a classic manifestation of [CWE-78].
Attack Vector
The attack is network-reachable through the device's administrative interface. An authenticated administrator submits a crafted PPPoE username containing shell metacharacters followed by arbitrary commands. When the device applies or reloads the PPPoE configuration, the sourced script evaluates the injected commands as root. See the GeoVision Cybersecurity Overview for vendor context.
Detection Methods for CVE-2026-88273
Indicators of Compromise
- Unexpected outbound connections from GV-LPC2211 devices to unknown hosts following PPPoE configuration changes.
- Presence of shell metacharacters (;, `, $(, |, newlines) inside stored PPPoE username fields.
- New or modified files, cron entries, or persistence artifacts on the device following administrative sessions.
Detection Strategies
- Audit administrative interface access logs for PPPoE configuration changes and correlate with the source IP of the change.
- Inspect stored device configuration exports for PPPoE username values that contain non-alphanumeric characters beyond @ and ..
- Monitor network segments hosting GV-LPC2211 devices for anomalous process behavior indicated by unexpected DNS queries, reverse shells, or unusual egress traffic.
Monitoring Recommendations
- Forward device syslog and administrative audit logs to a centralized SIEM for retention and correlation.
- Alert on any administrative login to the GV-LPC2211 management interface from outside a defined management network.
- Baseline normal outbound traffic patterns from camera and capture devices and alert on deviations.
How to Mitigate CVE-2026-88273
Immediate Actions Required
- Restrict access to the GV-LPC2211 administrative interface to a dedicated management VLAN or jump host.
- Rotate all administrator credentials and enforce unique, strong passwords per device.
- Review current PPPoE configuration values and remove any entries containing shell metacharacters.
- Contact GeoVision support and monitor the GeoVision Cybersecurity Overview page for firmware updates addressing CVE-2026-88273.
Patch Information
No vendor patch is referenced in the NVD entry at the time of publication. Consult the GeoVision Cybersecurity Overview for updated firmware releases and security bulletins that supersede firmware V1.13.
Workarounds
- Disable PPPoE on the device where WAN connectivity can be provided by an upstream router instead.
- Place affected devices behind a firewall that blocks inbound access to the management interface from untrusted networks.
- Limit administrator account issuance and require multi-factor authentication on jump hosts used to reach the device.
# Example: restrict management access to a trusted subnet using iptables on an upstream gateway
iptables -A FORWARD -s 10.10.20.0/24 -d 192.0.2.50 -p tcp --dport 443 -j ACCEPT
iptables -A FORWARD -d 192.0.2.50 -p tcp --dport 443 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.