Nozomi Arc up to 2.1.x certificate validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Nozomi Arc up to 2.1.x. This impacts an unknown function. The manipulation results in certificate validation. This vulnerability is known as CVE-2025-40896. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Nozomi Arc up to 2.1.x. It has been classified as problematic. Affected is an unknown functionality. The manipulation with an unknown input leads to a certificate validation vulnerability. CWE is classifying the issue as CWE-295. The product does not validate, or incorrectly validates, a certificate. This is going to have an impact on integrity. CVE summarizes:

The server certificate was not verified when an Arc agent connected to a Guardian or CMC. A malicious actor could perform a man-in-the-middle attack and intercept the communication between the Arc agent and the Guardian or CMC. This could result in theft of the client token and sensitive information (such as assets and alerts), impersonation of the server, or injection of spoofed data (such as false asset information or vulnerabilities) into the Guardian or CMC.

The weakness was published by Felix Eberstaller. The advisory is shared for download at security.nozominetworks.com. This vulnerability is traded as CVE-2025-40896 since 04/16/2025. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1587.003.

Upgrading to version 2.2.0 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 5.0

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 4.8
NVD Vector: 🔒

CNA Base Score: 6.5
CNA Vector (Nozomi): 🔒

CVSSv2info

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

Exploitinginfo

Class: Certificate validation
CWE: CWE-295 / CWE-287
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: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Arc 2.2.0

Timelineinfo

04/16/2025 CVE reserved
03/04/2026 +322 days Advisory disclosed
03/04/2026 +0 days VulDB entry created
03/06/2026 +2 days VulDB entry last update

Sourcesinfo

Advisory: security.nozominetworks.com
Researcher: Felix Eberstaller
Status: Confirmed

CVE: CVE-2025-40896 (🔒)
GCVE (CVE): GCVE-0-2025-40896
GCVE (VulDB): GCVE-100-348720

Entryinfo

Created: 03/04/2026 15:40
Updated: 03/06/2026 09:01
Changes: 03/04/2026 15:40 (76), 03/06/2026 09:01 (10)
Complete: 🔍
Cache ID: 216::103

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