CVE-2026-75826 Teltonika Networks CVE debrief

Who should care

Network administrators and security teams responsible for Teltonika Networks devices should assess exposure and apply patches or mitigations as needed. This includes reviewing device configurations and inventory for exposure, monitoring for suspicious activity on affected devices, and verifying the effectiveness of compensating controls. Additionally, security teams should prioritize patching or mitigating this vulnerability due to its high CVSS score and

Why it matters

CVE-2026-75826 is a high-severity command injection vulnerability in Teltonika Networks RUTOS and TSWOS devices. Authenticated attackers can execute arbitrary OS commands, posing a significant risk to affected systems. Network administrators and security teams should assess exposure and apply patches or mitigations as needed.

• Authenticated attackers can execute arbitrary OS commands, potentially leading to device compromise.
• Successful exploitation could allow attackers to access sensitive data or disrupt device operations.
• The vulnerability's high CVSS score indicates a significant risk to affected systems.
• Verification of device configurations and inventory is necessary to determine exposure.

Technical summary

The vulnerability exists in the backup function of Teltonika Networks RUTOS 7.22 before 7.24.6 and 7.25 before 7.25.2, and TSWOS 1.9 before 1.10.4. An authenticated remote attacker can execute arbitrary OS commands due to improper input validation. This vulnerability can be exploited remotely, and its successful exploitation could allow attackers to access sensitive data or disrupt device operations. Affected versions require immediate attention. The vulnerability's high CVSS score indicates a significant risk to affected systems.

Defensive priority

High

Recommended defensive actions

• Review and apply vendor-provided patches for affected RUTOS and TSWOS versions.
• Restrict access to the backup function to only necessary personnel.
• Monitor for suspicious activity on affected devices.
• Verify device configurations and inventory for exposure.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Evidence notes

The CVE Program and NVD provide official records of the vulnerability. However, details on exploitation and victim impact are limited. There is no information on public exploitation or specific victim impact. Defenders should verify device configurations and inventory for exposure and monitor for suspicious activity on affected devices. The lack of detailed information on exploitation and impact necessitates a cautious approach to vulnerability management.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.