Linksys MR9600/MX4200 TLS-SRP Connection os command injection

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Linksys MR9600 and MX4200. It has been classified as critical. Affected by this issue is some unknown functionality of the component TLS-SRP Connection Handler. This manipulation causes os command injection. This vulnerability is handled as CVE-2026-27849. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Linksys MR9600 and MX4200 (unknown version). It has been declared as critical. Affected by this vulnerability is an unknown code block of the component TLS-SRP Connection Handler. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at syss.de. This vulnerability is known as CVE-2026-27849 since 02/24/2026. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/28/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 9.8
ADP CISA Vector: 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

02/24/2026 CVE reserved
02/25/2026 +1 days Advisory disclosed
02/25/2026 +0 days VulDB entry created
02/28/2026 +3 days VulDB entry last update

Sourcesinfo

Vendor: linksys.com

Advisory: SYSS-2025-011
Status: Not defined

CVE: CVE-2026-27849 (🔒)
GCVE (CVE): GCVE-0-2026-27849
GCVE (VulDB): GCVE-100-347821

Entryinfo

Created: 02/25/2026 18:33
Updated: 02/28/2026 21:38
Changes: 02/25/2026 18:33 (53), 02/28/2026 21:38 (11)
Complete: 🔍
Cache ID: 216::103

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