SonicWall SonicOS SSLVPN Service stack-based overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability was found in SonicWall SonicOS and classified as critical. This vulnerability affects unknown code of the component SSLVPN Service. Such manipulation leads to stack-based overflow. This vulnerability is referenced as CVE-2025-40601. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in SonicWall SonicOS (the affected version is unknown) and classified as critical. Affected by this issue is an unknown code of the component SSLVPN Service. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is availability. CVE summarizes:

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.

The weakness was published by Saikiran Madugula as SNWLID-2025-0016. The advisory is available at psirt.global.sonicwall.com. This vulnerability is handled as CVE-2025-40601 since 04/16/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/21/2025).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2025-2640). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • SonicWall SSL-VPN

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.5
VulDB Temp Score: 7.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/16/2025 CVE reserved
11/20/2025 +218 days Advisory disclosed
11/20/2025 +0 days VulDB entry created
11/21/2025 +1 days VulDB entry last update

Sourcesinfo

Vendor: sonicwall.com

Advisory: SNWLID-2025-0016
Researcher: Saikiran Madugula
Status: Confirmed

CVE: CVE-2025-40601 (🔒)
GCVE (CVE): GCVE-0-2025-40601
GCVE (VulDB): GCVE-100-333050
CERT Bund: WID-SEC-2025-2640 - SonicWall SSL-VPN: Schwachstelle ermöglicht Denial of Service

Entryinfo

Created: 11/20/2025 14:25
Updated: 11/21/2025 04:44
Changes: 11/20/2025 14:25 (55), 11/21/2025 04:44 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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