Critical severity · published Feb 25, 2026
CVE-2026-27847
Missing authentication in Linksys MR9600, Linksys MX4200
9.8
CVSS
0.4%
EPSS
No
On KEV
Description
Due to improper neutralization of special elements, SQL statements can be injected via the handshake of a TLS-SRP connection. This can be used to inject known credentials into the database that can be utilized to successfully complete the handshake and use the protected service.
This issue affects MR9600: 1.0.4.205530; MX4200: 1.0.13.210200.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MR
MR9600 · Linksys
1.0.4.205530 · source: vendor
MX
MX4200 · Linksys
1.0.13.210200 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-27847
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-27847
www.syss.de
https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2025-009.txt
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CVE-2026-27846
Missing authentication in Linksys MR9600, Linksys MX4200