SonicWall SMA1000 AMC TOTP Authentication unicode encoding

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.4$0-$5k0.00

Summaryinfo

A vulnerability was found in SonicWall SMA1000. It has been rated as critical. Affected by this vulnerability is an unknown functionality of the component AMC TOTP Authentication. This manipulation causes improper handling of unicode encoding. This vulnerability is tracked as CVE-2026-4114. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in SonicWall SMA1000 (version unknown). It has been declared as critical. Affected by this vulnerability is an unknown function of the component AMC TOTP Authentication. The manipulation with an unknown input leads to a improper handling of unicode encoding vulnerability. The CWE definition for the vulnerability is CWE-176. The product does not properly handle when an input contains Unicode encoding. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Improper handling of Unicode encoding in SonicWall SMA1000 series appliances allows a remote authenticated SSLVPN admin to bypass AMC TOTP authentication.

It is possible to read the advisory at psirt.global.sonicwall.com. This vulnerability is known as CVE-2026-4114 since 03/13/2026. The exploitation appears to be easy. The attack can be launched remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/17/2026).

The vulnerability scanner Nessus provides a plugin with the ID 305940 (SonicWall SMA 1000 Series <= 12.4.3-03245 / 12.5.x <= 12.5.0-02283 Multiple Vulnerabilities (SNWLID-2026-0003)), which helps to determine the existence of the flaw in a target environment.

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 databases at Tenable (305940) and EUVD (EUVD-2026-20906). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 6.6
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: Improper handling of unicode encoding
CWE: CWE-176 / CWE-172
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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Nessus ID: 305940
Nessus Name: SonicWall SMA 1000 Series <= 12.4.3-03245 / 12.5.x <= 12.5.0-02283 Multiple Vulnerabilities (SNWLID-2026-0003)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

03/13/2026 CVE reserved
04/09/2026 +26 days Advisory disclosed
04/09/2026 +0 days VulDB entry created
05/17/2026 +38 days VulDB entry last update

Sourcesinfo

Vendor: sonicwall.com

Advisory: SNWLID-2026-0003
Status: Confirmed

CVE: CVE-2026-4114 (🔒)
GCVE (CVE): GCVE-0-2026-4114
GCVE (VulDB): GCVE-100-356587
EUVD: 🔒

Entryinfo

Created: 04/09/2026 17:36
Updated: 05/17/2026 08:19
Changes: 04/09/2026 17:36 (53), 04/09/2026 18:41 (1), 04/11/2026 01:02 (2), 05/17/2026 08:19 (11)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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