CVE-2025-40601

HIGH
Published Nov 20, 2025 Modified Dec 12, 2025 CWE-121

Description

A Stack-based buffer overflow vulnerability in the SonicOS SSLVPN service allows a remote unauthenticated attacker to cause Denial of Service (DoS), which could cause an impacted firewall to crash.

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CVSS v3.1 Score

7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-121 CWE-121

Affected Products

Vendor Product
sonicwall sonicos
sonicwall nsa_2700
sonicwall nsa_3700
sonicwall nsa_4700
sonicwall nsa_5700
sonicwall nsa_6700
sonicwall nssp_10700
sonicwall nssp_11700
sonicwall nssp_13700
sonicwall nssp_15700
sonicwall nsv270
sonicwall nsv470
sonicwall nsv870
sonicwall tz270
sonicwall tz270w
sonicwall tz370
sonicwall tz370w
sonicwall tz470
sonicwall tz470w
sonicwall tz570
sonicwall tz570p
sonicwall tz570w
sonicwall tz670
sonicwall sonicos
sonicwall nsa_2800
sonicwall nsa_3800
sonicwall nsa_4800
sonicwall nsa_5800
sonicwall tz280
sonicwall tz380
sonicwall tz480
sonicwall tz580
sonicwall tz680
sonicwall tz80

References

Frequently Asked Questions

What is CVE-2025-40601? +
A Stack-based buffer overflow vulnerability in the SonicOS SSLVPN service allows a remote unauthenticated attacker to cause Denial of Service (DoS), which could cause an impacted firewall to crash. It has a CVSS v3.1 base score of 7.5 (HIGH).
How severe is CVE-2025-40601? +
CVE-2025-40601 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2025-40601? +
CVE-2025-40601 affects products from sonicwall, specifically: nsa_2700, nsa_2800, nsa_3700, nsa_3800, nsa_4700, nsa_4800, nsa_5700, nsa_5800, nsa_6700, nssp_10700, nssp_11700, nssp_13700, nssp_15700, nsv270, nsv470, nsv870, sonicos, tz270, tz270w, tz280, tz370, tz370w, tz380, tz470, tz470w, tz480, tz570, tz570p, tz570w, tz580, tz670, tz680, tz80. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2025-40601? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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