TI-2026-22199 Aliases CVE-2026-27849 GHSA-f2jw-4mh9-f63v

Missing neutralization in Linksys MR9600, Linksys MX4200

HIGH 82CWE-78Published 2026-02-25 · Updated 2026-02-26

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-78.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00364 30th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linksys	MR9600	1.0.4.205530 and later	—	No fix listed	CNA
Linksys	MX4200	1.0.13.210200	—	No fix listed	CNA

MR9600 VendorLinksys Affected 1.0.4.205530 and later Fixed in — No fix listed CNA
MX4200 VendorLinksys Affected 1.0.13.210200 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-27849
2026-10-03 Alias added: GHSA-f2jw-4mh9-f63v
2026-10-23 EPSS moved to the 50th–90th percentile
2026-10-25 EPSS moved to the below the 50th percentile

References

Advisory 1

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

TI-2025-24206 Linksys Routers E/WAG/WAP/WES/WET/WRT-Series CVSS 4.0CRITICAL 10.0
TI-2017-12715 OS command injection in Linksys WVBR0 CVSS 3.0CRITICAL 9.8
TI-2026-70977 Stack-based buffer overflow in Linksys E1700 Mac Filter CVSS 4.0CRITICAL 10.0
TI-2026-22198 Missing neutralization in Linksys MR9600, Linksys MX4200 CVSS 3.1CRITICAL 9.8
TI-2026-22197 Missing authentication in Linksys MR9600, Linksys MX4200 CVSS 3.1CRITICAL 9.8
TI-2025-28791 Linksys E5600 v1.1.0.26 was discovered to contain a command injection vulnerability in… CVSS 3.1CRITICAL 9.8

See all 253 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences