MR9600: Improper Neutralization of Special Elements used in a Command
CVE-2026-6992 is a high-severity improper neutralization of special elements used in a command vulnerability in MR9600 from Linksys, with a CVSS 3.1 base score of 7.2 out of 10. It can be exploited remotely over the network by an attacker with administrator privileges, without any action from a user. Affected MR9600 versions: 2.0.6.206937. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 8.15% chance of exploitation within 30 days, which is in the top 5.06% of all scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of MR9600 you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linksys | MR9600 | 2.0.6.206937 | Not stated |
| Linksys | Mr9600 Firmware | 2.0.6.206937 | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (vuldb.com).
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 7.3 | High | CNA (vuldb.com) |
| CVSS 3.1 | 7.2 | High | CNA (vuldb.com) |
| CVSS 2.0 | 8.3 | High | CNA (vuldb.com) |
Official description
A vulnerability was identified in Linksys MR9600 2.0.6.206937. This affects the function BTRequestGetSmartConnectStatus of the file /etc/init.d/run_central2.sh of the component JNAP Action Handler. The manipulation of the argument pin leads to os command injection. The attack may be initiated remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Neutralization of Special Elements used in a Command
The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
How developers prevent this class of flaw
- If at all possible, use library calls rather than external processes to recreate the desired functionality.
- If possible, ensure that all external commands called from the program are statically created.
- Run time: Run time policy enforcement may be used in an allowlist fashion to prevent use of any non-sanctioned commands.
More Improper Neutralization of Special Elements used in a Command vulnerabilities (CWE-77)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- vuldb.com/submit/797086Third Party Advisory, VDB Entry
- vuldb.com/vuln/359544Third Party Advisory, VDB Entry
Technical write-ups (may include proof of concept)
- github.com/utmost3/cve/issues/2Exploit, Issue Tracking, Third Party Advisory
Other references
- vuldb.com/vuln/359544/ctiPermissions Required, VDB Entry
- linksys.com/Product
Other vulnerabilities in MR9600
- 8.8 High severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
Recent Improper Neutralization of Special Elements used in a Command vulnerabilities
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
- 9.8 Critical severity
- 7.3 High severity
- 8.8 High severity
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