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CVE Record

CVE-2026-71992: MSI Radix AXE6600 v781521 Command Injection via macfilter

MSI Radix AXE6600 router firmware version v781521 contains a command injection vulnerability in the macfilter function that allows remote attackers to execute arbitrary commands on the affected device. Attackers can exploit the macfilter function to inject malicious commands and obtain root privileges on the underlying system.

CriticalCVSS 9.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

A flaw in MSI RadiX AXE6600 firmware v781521 may let an unauthenticated remote attacker run operating-system commands as root. Successful compromise could expose network traffic, alter router settings, disrupt connectivity, or provide a foothold into connected environments. The supplied sources do not establish active exploitation.

Executive priority

Treat confirmed v781521 deployments as urgent. Identify exposed devices immediately, reduce untrusted access, and follow MSI's latest remediation guidance. Because root-level compromise could affect the router and connected network, potentially compromised devices should enter incident-response review rather than receive only routine patching.

Technical view

CVE-2026-71992 is a CWE-78 command injection vulnerability in the router's macfilter function. The CVSS 3.1 score is 9.8: network-accessible, low complexity, no privileges or user interaction, with high confidentiality, integrity, and availability impact. The source bundle associates the issue with firmware v781521, although its structured affected-version field ambiguously lists "0."

Likely exposure

MSI RadiX AXE6600 devices running firmware v781521 are the clearly described exposure. Risk is greatest where the vulnerable function is reachable from untrusted networks. The supplied material does not clarify default configuration, affected interface, or whether other firmware versions are vulnerable.

Exploitation context

The vulnerability reportedly permits remote, unauthenticated command execution with root privileges. However, CISA KEV status is false, and the supplied sources provide no evidence of exploitation in the wild. Absence from KEV does not prove that exploitation is impossible or has not occurred.

Researcher notes

The record identifies command injection in macfilter and root-level impact but supplies no technical root cause, affected endpoint details, safe detection signature, or confirmed fixed version. The structured version value "0" conflicts with the narrative's v781521 designation. Validate version scope and remediation directly with MSI before making broader assertions.

Mitigation direction

  • Inventory MSI RadiX AXE6600 routers and record their exact firmware versions.
  • Check MSI's support page for current security guidance and corrected firmware.
  • Apply vendor-approved firmware updates after appropriate operational testing.
  • Restrict untrusted network access to router administration and vulnerable functionality where feasible.
  • Monitor affected devices and connected networks for signs of unauthorized changes.

Validation and detection

  • Confirm each device model and firmware version through trusted inventory or administration records.
  • Compare installed firmware with MSI's latest published security guidance.
  • Verify whether the macfilter function is reachable from untrusted network segments.
  • Review router configuration for unexplained accounts, rules, DNS changes, or administration settings.
  • Investigate unexpected device behavior or network connections using established incident-response procedures.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-78: Command execution behavior lookup

Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-71992 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.8 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
3Timeline events
1ADP providers
4Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: total

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9.8CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9VulnCheck
9.3CVSS 4.0CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——VulnCheck

Vulnerability scoring details

Base CVSS 4.0 score

9.3Critical
CVSS 4.0 vector shape for CVE-2026-71992Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
MSIRadix AXE66000affected
Weakness

CWE details

CWE-78

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.