TIRESIS/Forecast/CVE-2025-40598
MEDIUM RISK

CVE-2025-40598

A Reflected cross-site scripting (XSS) vulnerability exists in the SMA100 series web interface, allowing a remote unauthenticated attacker to potentially execute arbitrary JavaScript code.

SMB Attack Probability Score
22/100medium
Weighted: EPSS · CISA KEV · SMB stack prevalence · exploit maturity · CVSS vector
CVSS v3
6.1
EPSS (30d)
0.08%
SMB Exposure
43.4/100
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
🔓
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
📋
23 Jul 2025
Vulnerability disclosed
CVE published by NVD with CVSS 6.1 (MEDIUM)
📍
TODAY
Today
EPSS: 0.1% probability of exploitation in next 30 days. SMB Risk Score: 22/100
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
sma 210 firmwaresma 410sma 210sma 500v firmwaresma 500vsma 410 firmware
Remediation & References
What to do
🔥Apply firewall firmware update via vendor PSIRT advisoryhigh

Firewall vulnerabilities are high-value targets — they sit at the network perimeter. Download the patched firmware from the vendor's official PSIRT page. Schedule an off-hours maintenance window to avoid business disruption during the update.

🌐Network-accessible service — review firewall exposuremedium

The affected service is reachable over the network. Verify that it is not exposed to the internet unnecessarily. Apply network segmentation to limit blast radius if exploited.

⚙️Disable management interface access from the internetmedium

The firewall management portal (web UI, SSH, API) should never be exposed directly to the internet. Restrict management access to internal IPs or a dedicated management VLAN only.

🎣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.