CVE-2026-27849

Name: CVE-2026-27849
Creator: NVD / NIST
Published: 2026-02-25T17:25:40.903+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.31%

Last modified Jun 17, 2026

CVE-2026-27849 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Due to missing neutralization of special elements, OS commands can be injected via the update functionality of a TLS-SRP connection, which is normally used for configuring devices inside the mesh network. This issue affects MR9600: 1.0.4.205530; MX4200: 1.0.13.210200.. EPSS estimates a 0.31% chance of exploitation in the next 30 days.

Description

Due to missing neutralization of special elements, OS commands can be injected via the update functionality of a TLS-SRP connection, which is normally used for configuring devices inside the mesh network. This issue affects MR9600: 1.0.4.205530; MX4200: 1.0.13.210200.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.31%

23.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

References

https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2025-011.txt

Timeline

Published: Feb 25, 2026
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2026-27849?

How severe is CVE-2026-27849?

CVE-2026-27849 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.31% probability of exploitation in the next 30 days.

How do I fix CVE-2026-27849?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-27849?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST