SonicWall SonicOS out-of-bounds

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability was found in SonicWall SonicOS. It has been declared as problematic. Affected by this issue is some unknown functionality. Such manipulation leads to out-of-bounds. This vulnerability is uniquely identified as CVE-2026-0402. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in SonicWall SonicOS (version now known) and classified as critical. Affected by this issue is some unknown processing. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is availability. CVE summarizes:

A post-authentication Out-of-bounds Read vulnerability in SonicOS allows a remote attacker to crash a firewall.

The weakness was disclosed by Vang3lis as SNWLID-2026-0001. The advisory is shared for download at psirt.global.sonicwall.com. This vulnerability is handled as CVE-2026-0402 since 12/02/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

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-2026-0495). Once again VulDB remains the best source for vulnerability data.

Affected

  • SonicWall SonicOS

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.2

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

ADP CISA Base Score: 4.9
ADP CISA Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / 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

12/02/2025 CVE reserved
02/24/2026 +84 days Advisory disclosed
02/24/2026 +0 days VulDB entry created
02/28/2026 +4 days VulDB entry last update

Sourcesinfo

Vendor: sonicwall.com

Advisory: SNWLID-2026-0001
Researcher: Vang3lis
Status: Confirmed

CVE: CVE-2026-0402 (🔒)
GCVE (CVE): GCVE-0-2026-0402
GCVE (VulDB): GCVE-100-347612
CERT Bund: WID-SEC-2026-0495 - SonicWall SonicOS: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 02/24/2026 17:28
Updated: 02/28/2026 15:46
Changes: 02/24/2026 17:28 (54), 02/24/2026 23:39 (7), 02/28/2026 15:46 (11)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

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