CVE-2026-38945: Raynet rvia Command Injection Vulnerability

CVE-2026-38945 Overview

CVE-2026-38945 is a command injection vulnerability in Raynet rvia version 12.6 Update 8 and earlier. The flaw resides in rvia's Java search functionality, which invokes the find command with improperly terminated search criteria. Adversaries can supply a crafted path that breaks out of the intended argument boundary and executes arbitrary commands in the context of the calling process. The vulnerability is classified as [CWE-77] Improper Neutralization of Special Elements used in a Command.

Critical Impact
A local authenticated attacker can execute arbitrary code with the privileges of the rvia process, leading to full compromise of confidentiality, integrity, and availability on the affected host.

Affected Products

Raynet rvia version 12.6 Update 8
Raynet rvia versions prior to 12.6 Update 8

Discovery Timeline

2026-05-27 - CVE-2026-38945 published to the National Vulnerability Database
2026-05-27 - Last updated in NVD database

Technical Details for CVE-2026-38945

Vulnerability Analysis

The vulnerability stems from how rvia constructs the argument list passed to the Unix find command during its Java search routine. The search criteria are not properly terminated, allowing a user-supplied path to bleed into adjacent find predicates such as -exec. An attacker who can influence the search path can append additional command directives that find will execute.

Because the attack vector is local and requires only low privileges with no user interaction, any authenticated user who can invoke or influence rvia's Java search can trigger the flaw. Successful exploitation grants code execution under the security context of the rvia process, which in deployment scenarios commonly runs with elevated privileges for software inventory and distribution tasks.

Root Cause

The root cause is improper neutralization of special elements in arguments passed to an OS command [CWE-77]. The Java search logic concatenates input into a find invocation without terminating the search criteria, so shell or find metacharacters embedded in a crafted path are interpreted as additional predicates rather than literal filename components.

Attack Vector

Exploitation requires local access with a valid user context that can reach the vulnerable search functionality. The attacker crafts a filesystem path or search argument that closes the existing predicate and appends a -exec clause or equivalent directive. When rvia executes its Java search, the injected directive runs the attacker's command. A proof-of-concept script demonstrating this technique is hosted at the GitHub Script for CVE-2026-38945. Additional technical context is published in the GitHub PoC Repository.

Detection Methods for CVE-2026-38945

Indicators of Compromise

Unexpected child processes spawned from the rvia Java process, particularly sh, bash, or interpreters launched via find -exec.
Filesystem paths or directory names containing find predicates such as -exec, -print, or shell metacharacters in rvia logs.
Outbound network connections originating from the rvia process to non-Raynet infrastructure.

Detection Strategies

Monitor process creation events where the parent process is rvia or its Java runtime and the child is a shell or scripting interpreter.
Inspect rvia audit logs for search operations referencing paths containing whitespace followed by - flag-like tokens.
Apply behavioral analytics that flag command execution chains terminating in privilege-sensitive actions after invocations of find.

Monitoring Recommendations

Enable command-line auditing (auditd on Linux, 4688 events on Windows) to capture full argument strings passed to find.
Forward rvia application logs to a centralized log platform and alert on anomalous search input patterns.
Track file integrity on rvia binaries and configuration directories to detect tampering following exploitation.

How to Mitigate CVE-2026-38945

Immediate Actions Required

Identify all hosts running Raynet rvia version 12.6 Update 8 or earlier and inventory their exposure to untrusted local users.
Restrict execution of rvia to trusted administrative accounts until a fixed version is deployed.
Review recent rvia search operations for paths containing command-injection patterns and investigate any matches.

Patch Information

At the time of publication, no fixed version is referenced in the NVD entry. Administrators should consult the Raynet Support Site for updated builds and vendor-issued remediation guidance for rvia version 12.6 Update 8 and earlier.

Workarounds

Remove or restrict local user access to systems running vulnerable rvia versions.
Enforce least privilege so rvia does not run with elevated permissions where feasible.
Apply allowlists on search inputs to reject paths containing shell or find metacharacters until a vendor patch is applied.

bash

# Example: identify rvia versions on Linux hosts
find / -type f -name 'rvia*' -exec sh -c 'echo "{}:"; "{}" --version 2>/dev/null' \;