THREATPORT/VULNERABILITY/CVE-2025-40597
HIGH SEVERITY

CVE-2025-40597

Sma 500v Firmware vulnerability

CVSS
7.5
EPSS
27.6%
EPSS pct
98th
Exploited
No known
A Heap-based buffer overflow vulnerability in the SMA100 series web interface allows remote, unauthenticated attacker to cause Denial of Service (DoS) or potentially results in code execution.
Affected vendor
Sonicwall
Affected product
Sma 500v Firmware
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
  • CWE-122 — Heap-based Buffer Overflow
Published
2025-07-23

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 27.6% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2025-40597

  • Confirm whether Sonicwall Sma 500v Firmware is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2025-40597.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2025-40597

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2025-40597 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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