TIRESIS/Forecast/CVE-2019-16149
LOW RISK

CVE-2019-16149

An Improper Neutralization of Input During Web Page Generation in FortiClientEMS version 6.2.0 may allow a remote attacker to execute unauthorized code by injecting malicious payload in the user profile of a FortiClient instance being managed by the vulnerable system.

SMB Attack Probability Score
19/100low
Weighted: EPSS · CISA KEV · SMB stack prevalence · exploit maturity · CVSS vector
CVSS v3
5.5
EPSS (30d)
0.10%
SMB Exposure
46/100
Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
🔓
SMB Impact
How this vulnerability affects a real small business
1
How this breaks an SMB

Firewall or VPN compromise gives attackers full internal network access — no further credentials needed. All connected systems are immediately at risk.

2
Typical real-world scenario

Automated scanner identifies the exposed appliance. Within hours, lateral movement begins: file servers, domain controller, and backup systems are reached.

3
Estimated downtime & cost
Est. downtime
3–7 days
Business cost range
€15K–€80K
4
What IT should check this week
Is this appliance directly internet-facing?
Is firmware/OS version patched to latest?
Are admin consoles accessible without MFA?
Is network segmentation between IT and OT/servers active?
Scenarios are generated based on software category and CVE characteristics. Cost ranges reflect SMB incidents in TIRESIS incident database.
Threat Evolution Timeline
From disclosure to predicted exploitation — 3 events
◈ 1 predicted
📋
28 Mar 2025
Vulnerability disclosed
CVE published by NVD with CVSS 5.5 (MEDIUM)
📍
TODAY
Today
EPSS: 0.1% probability of exploitation in next 30 days. SMB Risk Score: 19/100
Forecast →
✅
29 Jun 2026◈ predicted · in 60 days
Predicted: widespread patch adoption
Low EPSS suggests limited active exploitation. Most organizations expected to patch in routine maintenance cycle.
◈ Predicted eventsare estimates based on EPSS score, exploit maturity, and historical CVE progression patterns. They are not guaranteed outcomes.
Affected Products
forticlientems
Remediation & References
What to do
🔐Update VPN client/gateway firmware immediatelyhigh

VPN gateways are the primary attack surface for ransomware initial access. Apply the vendor patch immediately. If patching is delayed, consider temporarily disabling the VPN and using an alternative access method, or restricting access to specific IP ranges.

🛡Enable multi-factor authentication on VPNmedium

MFA on VPN significantly reduces the risk of credential-based exploitation. Even if this CVE is patched, MFA remains a critical defence layer for remote access.

🎣Raise user awareness — this can be triggered via phishingmedium

Exploitation requires user interaction (e.g., opening a file, clicking a link). While patching is the definitive fix, remind users not to open unexpected attachments or links. This type of vulnerability is commonly chained with phishing campaigns targeting SMBs.

NVD Full Entry ↗Official vulnerability detail, CVSS vectors, CPE listEPSS Score ↗Exploit Prediction Scoring System — FIRST.orgMitre CVE ↗MITRE CVE Program official entry
Vendor & Exploit References
Scoring Methodology

SMB Attack Probability Score weights: EPSS exploit likelihood (35%), CISA KEV active exploitation (25%), SMB stack prevalence (20%), exploit maturity (10%), CVSS network vector complexity (10%). Impact scenarios are derived from software category and historical SMB incident patterns. Scores recompute daily.