CVE-2026-22313 Overview
CVE-2026-22313 is an operating system command injection vulnerability [CWE-78] affecting a device that exposes a REST API over its management network. The web server authenticates requests with a token, but it fails to sanitize input passed to underlying shell commands. An authenticated attacker on the management network can inject arbitrary commands that execute with administrative privileges on the underlying operating system.
Critical Impact
An authenticated attacker can achieve full administrative command execution on the affected device, leading to complete compromise of confidentiality, integrity, and availability.
Affected Products
- Affected vendor and product details have not been disclosed in the public advisory at the time of writing
- Refer to the CVCN CVE-2026-22313 Entry for updates
- Devices exposing the described REST API on a management network
Discovery Timeline
- 2026-06-16 - CVE-2026-22313 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2026-22313
Vulnerability Analysis
The affected device runs a web server that exposes a REST API on the management network. The API enforces token-based authentication, restricting access to users who hold a valid session token. Once authenticated, a user can submit requests to endpoints that pass user-supplied values into operating system commands. The application does not properly neutralize shell metacharacters before invoking the underlying interpreter.
An attacker who possesses valid management credentials, or who obtains a token through credential theft or session reuse, can append arbitrary commands to legitimate API parameters. The injected commands run with administrative permissions inherited from the web server process. This breaks the security boundary between the API layer and the host operating system, allowing the attacker to read sensitive configuration, modify firmware, pivot into adjacent networks, or disable the device.
The scope change reflected in the CVSS vector indicates that exploitation impacts resources beyond the vulnerable component itself, such as the host OS and any connected management infrastructure.
Root Cause
The root cause is improper neutralization of special elements used in an OS command [CWE-78]. The REST API handler concatenates untrusted input directly into a shell command string instead of using parameterized execution or strict allowlist validation.
Attack Vector
Exploitation requires network access to the management interface and valid authentication credentials. The attacker sends a crafted HTTP request to the vulnerable REST API endpoint containing shell metacharacters such as ;, |, &&, or backticks. The web server passes the tainted input to a system shell, which executes the appended commands with administrative privileges.
No verified proof-of-concept code has been published. See the CVCN advisory for additional technical context.
Detection Methods for CVE-2026-22313
Indicators of Compromise
- Unexpected child processes spawned by the device web server, such as sh, bash, nc, wget, or curl
- REST API request logs containing shell metacharacters (;, |, &, `, $() in parameter values
- Outbound connections from the management interface to unfamiliar external hosts
- Configuration or firmware changes that do not correlate with scheduled administrator activity
Detection Strategies
- Inspect web server access logs for API requests carrying shell special characters or URL-encoded equivalents (%3B, %7C, %26)
- Monitor process ancestry on the device for shell interpreters launched by the web server user
- Alert on administrative actions executed outside of approved change windows or from unexpected source addresses
Monitoring Recommendations
- Forward device syslog, API audit logs, and process telemetry to a centralized SIEM for correlation
- Baseline normal REST API parameter patterns and flag deviations
- Restrict and monitor all source IP addresses authorized to reach the management network
How to Mitigate CVE-2026-22313
Immediate Actions Required
- Restrict the management network to a dedicated VLAN or out-of-band segment reachable only by authorized administrators
- Rotate all API tokens and administrative credentials used to authenticate to the device
- Review recent API access logs for evidence of command injection attempts and post-exploitation activity
- Apply vendor-supplied patches as soon as they are released
Patch Information
At the time of publication, vendor and patch details are not listed in the NVD entry. Consult the CVCN CVE-2026-22313 Entry for vendor coordination updates and remediation guidance.
Workarounds
- Limit REST API access to a trusted management subnet using firewall rules or access control lists
- Disable the REST API or the management web server if it is not required for operations
- Enforce strong, unique tokens and apply rate limiting on authentication endpoints to reduce the value of compromised credentials
# Example: restrict access to the management API to a trusted admin subnet
iptables -A INPUT -p tcp --dport 443 -s 10.10.10.0/24 -j ACCEPT
iptables -A INPUT -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.
