Tenable Agent up to 11.0.3/11.1.1 on Windows default permission

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability has been found in Tenable Agent up to 11.0.3/11.1.1 on Windows and classified as critical. This impacts an unknown function. Performing a manipulation results in default permission. This vulnerability is known as CVE-2026-2026. Attacking locally is a requirement. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in Tenable Agent up to 11.0.3/11.1.1 on Windows. This affects an unknown part. The manipulation with an unknown input leads to a default permission vulnerability. CWE is classifying the issue as CWE-276. During installation, installed file permissions are set to allow anyone to modify those files. This is going to have an impact on availability. The summary by CVE is:

A vulnerability has been identified where weak file permissions in the Nessus Agent directory on Windows hosts could allow unauthorized access, potentially permitting Denial of Service (DoS) attacks.

The weakness was published with Lockheed Martin Red Team. It is possible to read the advisory at tenable.com. This vulnerability is uniquely identified as CVE-2026-2026 since 02/05/2026. The exploitability is told to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1222 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 298991 (Tenable Nessus Agent < 11.0.4 / 11.1.x < 11.1.2 DoS (TNS-2026-05)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 11.0.4 or 11.1.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (298991) and CERT Bund (WID-SEC-2026-0414). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Tenable Security Nessus

Productinfo

Vendor

Name

Version

License

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: 4.7
VulDB Meta Temp Score: 4.6

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.1
CNA Vector (tenable): 🔒

CVSSv2info

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

Exploitinginfo

Class: Default permission
CWE: CWE-276 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 298991
Nessus Name: Tenable Nessus Agent < 11.0.4 / 11.1.x < 11.1.2 DoS (TNS-2026-05)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Agent 11.0.4/11.1.2

Timelineinfo

02/05/2026 CVE reserved
02/13/2026 +8 days Advisory disclosed
02/13/2026 +0 days VulDB entry created
02/14/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: tenable.com
Organization: Lockheed Martin Red Team
Status: Confirmed

CVE: CVE-2026-2026 (🔒)
GCVE (CVE): GCVE-0-2026-2026
GCVE (VulDB): GCVE-100-345915
CERT Bund: WID-SEC-2026-0414 - Tenable Security Nessus Agent: Schwachstelle erm&ouml;glicht Umgehen von Sicherheitsvorkehrungen und DoS

Entryinfo

Created: 02/13/2026 18:22
Updated: 02/14/2026 16:44
Changes: 02/13/2026 18:22 (77), 02/14/2026 02:34 (2), 02/14/2026 11:40 (1), 02/14/2026 16:44 (10)
Complete: 🔍
Cache ID: 216::103

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

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