CVE-2026-67609

Telenia TVox 26.5.3 Privilege Escalation via Insecure sudoers Configuration

Published Aug 3, 2026 CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed

Description

Telenia Software TVox 26.5.3 and prior 26.x versions, and 24.9.21 and prior 24.x versions, contain a privilege escalation vulnerability that allows attackers with access to the apache account to execute arbitrary commands as root by exploiting an insecure sudoers configuration in /etc/sudoers.d/telenia. The configuration grants the apache user NOPASSWD execution of /bin/nice, which can be leveraged to invoke arbitrary commands, enabling full root-level command execution without supplying a password.

Analysis

Technical impact

The vulnerability is caused by an insecure sudoers configuration that allows the apache account to run /bin/nice without a password, which can be leveraged to invoke arbitrary commands with root privileges. This results in a privilege escalation attack. The weakness is classified as CWE-250, which involves unauthorized use of privileged credentials.

Affected Systems

Telenia Software TVox 26.5.3 and earlier 26.x releases, as well as 24.9.21 and earlier 24.x releases are affected by the insecure sudoers configuration.

Risk and Exploitability

The CVSS v3.1 score is 8.5, indicating high severity. The EPSS score is not available, and the vulnerability is not listed in the CISA KEV catalog. The attack vector is local: an attacker who can run commands as the apache user can exploit the NOPASSWD rule to execute arbitrary commands as root, leading to full system compromise. Because any user who has access to the web server can potentially trigger the exploit, the risk of exploitation is significant in environments where the apache account is not strictly isolated.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Telenia Software

TVox

affected

Version	Status	Constraints
`26.0.0`	affected	≤ 26.5.3
`24.0.0`	affected	≤ 24.9.21

No data.

Vendor Product Versions

Teleniasoftware

Tvox

Version	Status	Scheme	Platform
`[26.0.0,26.5.3]`	affected	semver	—
`[24.0.0,24.9.21]`	affected	semver	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Apply the latest patch or upgrade to a version of TVox that removes the NOPASSWD rule for apache.
If an update is not possible, edit /etc/sudoers.d/telenia to delete or comment out the line granting NOPASSWD to /bin/nice for the apache user.
Restrict access to the apache account by hardening the web application, implementing IP whitelisting or strict firewall rules, and ensuring that only trusted hosts can reach the server.

Generated by OpenCVE AI on August 4, 2026 at 10:13 UTC.

Tracking

Advisories

No advisories available

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.199% probability within 30 days)

Exploitation poc

Automatable no

Technical Impact total

References

Link	Providers
https://karmainsecurity.com/KIS-2026-16
https://www.teleniasoftware.com/
https://www.vulncheck.com/advisories/telenia-tvox-privilege-escalation-via-insecure-sudoers-configuration

History

Aug 3, 2026 5:15 PM Added references View changes

Type	Values Removed	Values Added
References		https://www.vulncheck.com/advisories/telenia-tvox-privilege-escalation-via-insecure-sudoers-configuration

Aug 3, 2026 4:15 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Teleniasoftware Teleniasoftware tvox
Vendors & Products		Teleniasoftware Teleniasoftware tvox

Aug 3, 2026 3:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Aug 3, 2026 2:30 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		Telenia Software TVox 26.5.3 and prior 26.x versions, and 24.9.21 and prior 24.x versions, contain a privilege escalation vulnerability that allows attackers with access to the apache account to execute arbitrary commands as root by exploiting an insecure sudoers configuration in /etc/sudoers.d/telenia. The configuration grants the apache user NOPASSWD execution of /bin/nice, which can be leveraged to invoke arbitrary commands, enabling full root-level command execution without supplying a password.
Title		Telenia TVox 26.5.3 Privilege Escalation via Insecure sudoers Configuration
Weaknesses		CWE-250
References		https://karmainsecurity.com/KIS-2026-16 https://www.teleniasoftware.com/
Metrics		cvssV3_1 `{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}` cvssV4_0 `{'score': 8.5, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}`