CVE-2025-58034# 🔒 🚨 CVE-2025-58034: FortiWeb OS Command Injection Zero-Day 🔥
**Professional Security Bulletin** | *Issued: November 19, 2025* | *Status: Actively Exploited Zero-Day*
*Fortinet FortiWeb Web Application Firewall (WAF) – Immediate Action Required* 🛡️
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## 📋 Executive Summary
Fortinet has disclosed **CVE-2025-58034**, a **high-severity OS Command Injection vulnerability** (CVSS 7.2) in its FortiWeb product line. This flaw allows **authenticated attackers** to execute arbitrary operating system commands via crafted HTTP requests or CLI inputs, potentially leading to full system compromise.
**Critical Alert**: Exploitation has been observed in the wild since early November 2025, with cybersecurity firm Trend Micro detecting **~2,000 exploit attempts**. This marks the **second FortiWeb zero-day** in under a week (following CVE-2025-64446, CVSS 9.1). The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added it to its **Known Exploited Vulnerabilities (KEV) Catalog**, mandating federal agencies to patch by **November 25, 2025**.
**Recommendation**: Upgrade to patched versions immediately. Review logs for unauthorized command execution and restrict admin access.
*Reported by*: Jason McFadyen (Trend Micro) under Fortinet's responsible disclosure program.
*Advisory ID*: FG-IR-25-028 (Fortinet PSIRT).
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## 🎯 Vulnerability Details
| **Attribute** | **Details** |
|----------------------------|-----------------------------------------------------------------------------|
| **CVE ID** | CVE-2025-58034 |
| **Description** | An **Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')** vulnerability [CWE-78]. Authenticated attackers can inject and execute unauthorized OS commands on the underlying system. |
| **Severity** | **Medium** (CVSS v3.1 Base Score: 6.7/10.0) |
| **CVSS Vector** | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H <br> - **Attack Vector**: Network (remote) <br> - **Attack Complexity**: Low <br> - **Privileges Required**: Low (authenticated) <br> - **User Interaction**: None <br> - **Scope**: Unchanged <br> - **Impact (C/I/A)**: High (Confidentiality, Integrity, Availability) |
| **Attack Requirements** | Requires valid authentication (e.g., admin credentials). Can be chained with auth bypass flaws (like CVE-2025-64446) for unauthenticated RCE. |
| **Disclosure Date** | November 18, 2025 |
| **Patch Availability** | Yes – Released November 18, 2025 |
**Technical Root Cause**: The flaw arises from inadequate sanitization of user-supplied inputs in CLI commands and HTTP API endpoints, allowing injection of OS commands (e.g., `; id` or `&& cat /etc/passwd`).
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## 🖥️ Affected Products & Versions
FortiWeb versions vulnerable to arbitrary command execution:
| **Product** | **Affected Versions** | **Patched Versions** |
|-------------|----------------------------------------|---------------------------------------|
| **FortiWeb** | 7.6.0 – 7.6.5 <br> 7.4.0 – 7.4.10 <br> 7.2.0 – 7.2.11 <br> 7.0.0 – 7.0.11 <br> **8.0.0 – 8.0.1** | Upgrade to: <br> 7.6.6+ <br> 7.4.11+ <br> 7.2.12+ <br> 7.0.12+ <br> **8.0.2+** |
*Note*: This vulnerability has existed since at least early 2023 (introduction of 7.0.0). All deployments on affected versions should be scanned and updated.
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## ⚔️ Exploitation Status & Threat Landscape
- **Active Exploitation**: Confirmed by Fortinet – attackers are leveraging this for **remote code execution (RCE)** post-authentication. Trend Micro reported **2,000+ attempts** globally, targeting exposed FortiWeb instances.
- **Attack Vector**: Crafted HTTP/HTTPS requests to management interfaces (e.g., API endpoints like `/api/v2/cmdb/system/interface`). Indicators include anomalous command echoes in logs (e.g., `uid=0(root)`).
- **Threat Actors**: No specific attribution, but aligns with patterns from state-sponsored groups (e.g., Volt Typhoon's prior Fortinet exploits).
- **Real-World Impact**: Potential for data exfiltration, backdoor installation, or lateral movement in protected networks. Recent X discussions highlight chaining with CVE-2025-64446 for unauthenticated access.
- **PoC Availability**: No public exploits yet, but the CWE-78 nature makes it straightforward for skilled adversaries.
**Recent X Buzz** (Latest as of Nov 19, 2025):
- Security pros urge immediate patching: "Fortinet reports active exploitation... patch immediately and review traffic logs."
- Latvian CERT warns: "High-risk vulnerability... exploitation observed in cyberspace."
- Polish analyst notes: "Another FortiWeb vuln! 0-day in real attacks... CISA added to KEV."
#### Save this as CVE-2025-58034.py and run with `sudo python3 CVE-2025-58034.py --target https://your-fortiweb-ip --username admin --password pass`
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## 🛡️ Mitigation & Remediation
### Immediate Actions
1. **Patch Priority**: Upgrade to the latest fixed release (see table above). Download from Fortinet Support Portal.
2. **Access Controls**:
- Restrict management interface to trusted IP ranges (e.g., via firewall rules).
- Enforce **multi-factor authentication (MFA)** for all admin accounts.
- Apply **least-privilege principles** – avoid high-priv accounts for routine tasks.
3. **Monitoring**:
- Audit logs for suspicious CLI/HTTP activity (e.g., injection patterns like `;`, `&&`, or `%0a`).
- Enable anomaly detection on WAF rulesets.
4. **Workarounds** (If Patching Delayed):
- Disable CLI access over HTTP/HTTPS if unused.
- Use network segmentation to isolate FortiWeb.
### Post-Exploitation Checks
- Review configurations for unauthorized changes (e.g., new admin accounts).
- Scan for persistence (e.g., cron jobs, backdoors).
- Tools: Nessus, OpenVAS, or FortiGuard scanners for detection.
**CISA Guidance**: Federal entities must apply mitigations by Nov 25, 2025, due to "significant risks to the federal enterprise."
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## 🔗 References & Further Reading
- **Official Fortinet Advisory**: [FG-IR-25-028](https://fortiguard.fortinet.com/psirt/FG-IR-25-028)
- **Trend Micro Report**: [Original Disclosure](https://www.trendmicro.com/en_us/research/25/c/CVE-2025-58034.html)
- **CISA KEV Catalog**: [CVE-2025-58034 Entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog)
- **In-Depth Analyses**:
- [The Hacker News](https://thehackernews.com/2025/11/fortinet-warns-of-new-fortiweb-cve-2025.html)
- [Security Affairs](https://securityaffairs.com/184806/hacking/new-fortiweb-zero-day-cve-2025-58034-under-attack-patched-by-fortinet.html)
- [Bleeping Computer](https://www.bleepingcomputer.com/news/security/fortinet-warns-of-new-fortiweb-zero-day-exploited-in-attacks/)
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### ⚠️ Disclaimer:
The information provided here is for educational and informational purposes only. Use of this information for unauthorized access, exploitation, or attack on systems is illegal and strictly prohibited. Always follow applicable laws, regulations, and organizational policies when handling vulnerabilities.
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**Stay Vigilant** 🌐 | For tailored remediation assistance or IOCs, contact Fortinet Support or your cybersecurity team. This advisory will be updated as new details emerge.
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