CVE-2026-107459

Executive Summary

CVE-2026-107459 is an unauthenticated OS command injection vulnerability (CWE-78) in Openfind SecuShare Pro, a file-sharing and collaboration platform. Because the flaw is reachable without authentication and over the network, any remote attacker who can reach an exposed instance can inject and execute arbitrary operating-system commands on the underlying server. With a CVSS base score of 9.8 (Critical) and no patch evidence, no public PoC, and no CISA KEV listing, this is a high-severity, remotely exploitable defect affecting internet-facing deployments.

Technical Analysis

The affected product is SecuShare Pro, developed by Openfind. The NVD description states plainly: "The SecuShare Pro developed by Openfind has an OS Command Injection vulnerability. Unauthenticated remote attackers can inject arbitrary OS commands and execute them on the server."

This maps to CWE-78 (Improper Neutralization of Special Elements used in an OS Command). The vulnerability class is well understood: the application passes attacker-controlled input into a system shell or command-execution primitive without adequate sanitization or the use of safe APIs (for example, passing data to system(), exec(), popen(), or shell metacharacter concatenation). Shell metacharacters such as ;, |, &&, $(), or backticks then allow an attacker to break out of the intended command context and append arbitrary commands.

Because the vulnerability is described as unauthenticated, the injection point must be reachable from an unauthenticated network context — i.e., a pre-authentication request handler. The precise injection parameter, endpoint, and the specific command wrapper are not disclosed in the NVD description or CNA title provided. No affected version list, no OSV package data, and no vendor advisory content are available. Accordingly, the exact code path cannot be described without fabrication; the above analysis is confined to the vulnerability class and attack surface (pre-auth, network-reachable command execution).

The CVSS 3.1 vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H is consistent with a pre-auth RCE: network-reachable, low attack complexity, no privileges required, no user interaction, and full impact to confidentiality, integrity, and availability. The scope is rated Unchanged (S:U), meaning the vulnerable component is treated as the authority boundary even though command execution occurs on the host — a common but conservative scoring choice for web-app RCE.

Exploitation Scenarios

Note: No public PoC, exploit code, or Nuclei template exists for CVE-2026-107459. The attack chain below is inferred strictly from the disclosed vulnerability class (CWE-78) and the stated pre-auth, network-reachable condition. No specific endpoints, parameters, or function names are fabricated.

1. Reconnaissance / target identification. An attacker scans for internet-exposed SecuShare Pro instances using HTTP fingerprints (HTML body markers, page titles, or TLS certificate metadata matching SecuShare). Shodan/censys-style enumeration enables bulk identification of reachable deployments.

2. Trigger of the flaw class. The attacker sends a crafted HTTP request to a pre-authentication request handler that constructs and executes an OS command from user-supplied input. The absence of authentication (PR:N) means no valid session or credentials are required to reach the vulnerable code path.

3. Payload / execution at the class level. The attacker inserts shell metacharacters and command syntax into the vulnerable input, causing the application to execute attacker-chosen commands under the web server / application service account. This is the canonical CWE-78 mechanism; the specific delimiter and parameter are undisclosed.

4. Post-exploitation impact. Successful injection yields arbitrary command execution in the context of the vulnerable service (commonly the web server user). Because the CVSS availability, integrity, and confidentiality impacts are all High, an attacker can read and exfiltrate sensitive files, modify data or configuration, and disrupt service. Depending on the host's privilege posture, an attacker may escalate toward full server compromise and pivot into the internal network.

Because no patch, PoC, or in-the-wild telemetry is available, defenders should assume exploitability at the vulnerability-class level and prioritize external attack-surface reduction.

Impact Assessment

CVE-2026-107459 carries a CVSS 3.1 base score of 9.8 (Critical) with vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. The subscores indicate:

• Attack Vector: Network (N) — exploitable remotely, no local access required.
• Attack Complexity: Low (L) — no special conditions or race timing.
• Privileges Required: None (N) — unauthenticated; no credentials needed.
• User Interaction: None (N) — no victim action required.
• Scope: Unchanged (U) — impact confined to the vulnerable component's authority.
• Confidentiality/Integrity/Availability: High/High/High — total compromise of data confidentiality, system integrity, and service availability.

Blast radius. Any internet-facing SecuShare Pro deployment is potentially at risk. Because SecuShare Pro is a file-sharing/collaboration product, it commonly stores or brokers sensitive organizational documents — making successful exploitation a direct data-breach vector. Command execution on the server also risks lateral movement into adjacent systems.

EPSS. The EPSS score is 0.01467 (~1.5%) at the 72.9th percentile. This indicates a low-to-moderate current exploitation likelihood based on public signals, consistent with the absence of a public PoC — but EPSS is forward-looking and does not eliminate risk, particularly for high-value collaboration servers.

KEV status. Not listed in CISA KEV as of this report; no exploit-in-the-wild evidence is available.

Detection Guidance

Detection content below targets the vulnerability class (OS command injection / post-exploitation shell activity) because the specific injection point is undisclosed. Rules emphasize anomalous process spawning, suspicious shell metacharacters in inbound HTTP requests, and outbound behavior consistent with command execution.

Sigma Rule

title: Potential OS Command Injection Child Process Spawn from Web Server (SecuShare Pro CVE-2026-107459)
id: 8f2c1d74-9a3b-4e21-b7c5-0d6a1e9f4c33
status: experimental
description: Detects a web/application service spawning shell or reconnaissance binaries, consistent with OS command injection against Openfind SecuShare Pro.
references:
  - https://nvd.nist.gov/vuln/detail/CVE-2026-107459
author: Threat Intelligence
date: 2026/01/01
tags:
  - attack.t1190
  - attack.t1059.004
logsource:
  category: process_creation
  product: linux
detection:
  selection_parent:
    ParentImage|endswith:
      - '/httpd'
      - '/apache2'
      - '/nginx'
      - '/node'
      - '/java'
  selection_child:
    Image|endswith:
      - '/sh'
      - '/bash'
      - '/dash'
      - '/id'
      - '/whoami'
      - '/uname'
      - '/curl'
      - '/wget'
      - '/nc'
      - '/ncat'
  condition: selection_parent and selection_child
falsepositives:
  - Legitimate application maintenance scripts invoking shell utilities
  - Web-based administration interfaces
level: high

YARA Rule

rule CVE_2026_107459_SecuShare_Command_Injection_Webshell
{
    meta:
        description = "Detects command-injection webshell or shell-invocation artifacts potentially related to CVE-2026-107459 in Openfind SecuShare Pro web content"
        author = "Threat Intelligence"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2026-107459"
        date = "2026-01-01"
        severity = "high"
    strings:
        $s1 = "SecuShare" nocase
        $c1 = "system(" ascii
        $c2 = "exec(" ascii
        $c3 = "popen(" ascii
        $c4 = "Runtime.getRuntime().exec" ascii
        $sh1 = "/bin/sh -c" ascii
        $sh2 = "cmd.exe /c" ascii
        $meta1 = ";" ascii
        $meta2 = "|" ascii
        $meta3 = "&&" ascii
        $meta4 = "$(" ascii
    condition:
        (uint16(0) == 0x3C3F or uint16(0) == 0x6874) and
        ($s1 or any of ($c*)) and
        ($sh1 or $sh2) and
        1 of ($meta*)
}

Suricata IDS Rule

alert http any any -> any any (msg:"CVE-2026-107459 Possible OS Command Injection Attempt Against Openfind SecuShare Pro"; flow:established,to_server; http.method; content:"GET" or content:"POST"; http.uri; pcre:"/(?:;|\||&&|`|\$\(|\$\{).{0,40}(?:id|whoami|uname|curl|wget|nc|cat%20\/etc\/passwd)/Ui"; classtype:web-application-attack; reference:cve,2026-107459; reference:url,nvd.nist.gov/vuln/detail/CVE-2026-107459; sid:2026107459; rev:1;)

Elastic Detection

process where event.type == "start" and
  process.parent.name in ("httpd", "apache2", "nginx", "node", "java", "tomcat") and
  process.name in ("sh", "bash", "dash", "id", "whoami", "uname", "curl", "wget", "nc", "ncat")

Splunk SPL Query

index=web OR index=proxy sourcetype=access_combined OR sourcetype=stream:http
| eval inj = if(match(uri, "(?i)(;|\||&&|`|\$\(|\$\{).*(id|whoami|uname|curl|wget|nc|cat\s+/etc/passwd)"), 1, 0)
| where inj=1
| stats count min(_time) as first_seen max(_time) as last_seen values(uri) as uris by src_ip, dest_ip, http_user_agent
| where count >= 1
| sort - count

Wazuh OSSEC Rule

<group name="web,attack,cve-2026-107459,">
  <rule id="2026107459" level="12">
    <decoded_as>web-accesslog</decoded_as>
    <match>(?:;|\||&&|`|\$\(|\$\{).{0,40}(?:id|whoami|uname|curl|wget|nc|cat\s+/etc/passwd)</match>
    <description>CVE-2026-107459: Possible OS command injection attempt against Openfind SecuShare Pro</description>
    <mitre>
      <id>T1190</id>
      <id>T1059.004</id>
    </mitre>
    <group>web_scan,command_injection,</group>
  </rule>
</group>

Mitigation & Patch Guidance

Patch confidence: 0/4 — UNPATCHED. No patch, vendor fix, affected version list, or workaround has been published by any tracked source.

1) Immediate mitigations (compensating controls):

• Remove SecuShare Pro from direct internet exposure. Place it behind a VPN, zero-trust access gateway, or authenticated reverse proxy so only trusted networks can reach it.
• If external exposure is unavoidable, enforce strict IP allow-listing at the perimeter/WAF and block known scanning infrastructure.
• Deploy WAF rules (or the Suricata/Sigma content above) to flag shell metacharacters (;, |, &&, $(), backticks) in inbound HTTP requests, and alert on any application-parent process spawning shell binaries.
• Apply least privilege to the service account running SecuShare Pro; use container/OS-level confinement (seccomp, AppArmor/SELinux, read-only filesystems) to limit the impact of command execution.
• Segment the host so that a compromise cannot reach internal file shares or management networks.

2) Patch / upgrade steps:

• No official patch currently exists. Monitor Openfind's advisory and product channels for a SecuShare Pro security update.
• Contact Openfind support to request a fixed build and a definitive list of affected versions.
• As soon as a patched version is released, validate it in a staging environment, back up configuration and data, then upgrade all exposed instances. Classify this as an emergency change given the 9.8 CVSS.

3) Long-term hardening:

• Adopt an asset inventory that fingerprints and continuously monitors for SecuShare Pro versions so future advisories can be mapped rapidly.
• Establish a pre-authorization and safe-command-execution standard (avoid shell invocation of user input; use parameterized process APIs).
• Enforce egress filtering to prevent attacker command-and-control and data exfiltration if RCE occurs.
• Integrate EPSS/KEV feeds into vulnerability management; re-evaluate urgency as EPSS or vendor signals change.

References

1. NVD — CVE-2026-107459: https://nvd.nist.gov/vuln/detail/CVE-2026-107459
2. CWE-78 — Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'): https://cwe.mitre.org/data/definitions/78.html
3. MITRE ATT&CK T1190 — Exploit Public-Facing Application: https://attack.mitre.org/techniques/T1190/
4. Openfind SecuShare Pro product/vendor information: https://www.openfind.com/ (vendor site — monitor for a security advisory)
5. FIRST EPSS — CVE-2026-107459 scoring data: https://api.first.org/data/v1/epss?cve=CVE-2026-107459

Threat actor / in-the-wild note: No public PoC, exploit code, Nuclei template, CISA KEV listing, or reported threat-actor campaign is associated with CVE-2026-107459 at the time of writing. Exploitation potential is assessed from the vulnerability class (unauthenticated pre-auth OS command injection, CVSS 9.8) rather than observed activity.