CVE-2025-40601
SonicOS SSLVPN Stack-Based Buffer Overflow Denial of Service
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.
INFO
Published Date :
Nov. 20, 2025, 3:17 p.m.
Last Modified :
Dec. 12, 2025, 3:57 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-40601
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update to the latest version.
- Apply vendor-supplied security patches.
- Restart the affected service.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-40601.
| URL | Resource |
|---|---|
| https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2025-0016 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-40601 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-40601
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-40601 vulnerability anywhere in the article.
-
TheCyberThrone
SonicWall SSLVPN Vulnerability CVE-2025-40601
November 23, 2025A critical vulnerability was discovered affecting SonicWall firewalls’ SSLVPN service, identified as CVE-2025-40601. This stack-based buffer overflow flaw allows unauthenticated remot ... Read more
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CybersecurityNews
SonicOS SSLVPN Vulnerability Let Attackers Crash the Firewall Remotely
SonicWall has disclosed a critical stack-based buffer overflow vulnerability in its SonicOS SSLVPN service. That allows remote unauthenticated attackers to crash firewalls through denial-of-service at ... Read more
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BleepingComputer
New SonicWall SonicOS flaw allows hackers to crash firewalls
American cybersecurity company SonicWall urged customers today to patch a high-severity SonicOS SSLVPN security flaw that can allow attackers to crash vulnerable firewalls. Tracked as CVE-2025-40601, ... Read more
The following table lists the changes that have been made to the
CVE-2025-40601 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Dec. 12, 2025
Action Type Old Value New Value Added CPE Configuration AND OR *cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:* versions from (including) 7.1.1-7040 up to (excluding) 7.3.1-7013 OR cpe:2.3:h:sonicwall:tz670:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:tz570:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:tz470:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:tz470w:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:tz570p:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:tz570w:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:tz270:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:tz270w:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:tz370:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:tz370w:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:nssp_13700:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:nssp_15700:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:nsa_6700:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:nsa_4700:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:nsa_2700:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:nsa_3700:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:nsa_5700:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:nssp_10700:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:nssp_11700:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:nsv870:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:nsv470:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:nsv270:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:* versions up to (excluding) 8.0.3-8011 OR cpe:2.3:h:sonicwall:tz80:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:nsa_2800:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:nsa_3800:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:nsa_4800:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:nsa_5800:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:tz280:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:tz380:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:tz480:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:tz580:-:*:*:*:*:*:*:* cpe:2.3:h:sonicwall:tz680:-:*:*:*:*:*:*:* Added Reference Type SonicWALL, Inc.: https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2025-0016 Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Nov. 20, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H -
New CVE Received by [email protected]
Nov. 20, 2025
Action Type Old Value New Value Added 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. Added CWE CWE-121 Added Reference https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2025-0016