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PatchSiren cyber security CVE debrief

CVE-2026-18614 GL-iNet CVE debrief

A vulnerability was found in GL-iNet GL-MT3000 up to 4.4.5. The function s2s.enable_echo_server of the file /cgi-bin/glc of the component s2s.so Native Plugin is impacted. Performing a manipulation of the argument port results in command injection. The attack may be initiated remotely. The exploit has been made public and could be used. Defenders should assess exposure and verify compensating controls for GL-iNet GL-MT3000 devices running firmware up to 4.4.5. This executive overview covers the affected product, vulnerability class, likely operational impact, and source-confidence limits.

Vendor
GL-iNet
Product
GL-MT3000
CVSS
HIGH 8.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-03
Original CVE updated
2026-10-23
Advisory published
2026-08-03
Advisory updated
2026-10-23

Who should care

Defenders responsible for GL-iNet GL-MT3000 devices, particularly those running firmware up to 4.4.5, should assess exposure and verify the effectiveness of current compensating controls.

Why it matters

Defenders should prioritize verifying exposure of GL-iNet GL-MT3000 devices running firmware up to 4.4.5 and assess the effectiveness of current compensating controls due to a command injection vulnerability in the s2s.enable_echo_server function.

  • Verify exposure of GL-iNet GL-MT3000 devices running firmware up to 4.4.5
  • Assess the effectiveness of current compensating controls
  • Monitor for potential exploitation attempts

Technical summary

The vulnerability is caused by a command injection issue in the s2s.enable_echo_server function of the /cgi-bin/glc file in the s2s.so Native Plugin. This can be exploited remotely by manipulating the port argument. The affected product is GL-iNet GL-MT3000 running firmware up to 4.4.5. Defenders should prioritize verifying exposure and assessing compensating controls. Technical framing suggests reviewing official advisories and CVE records for affected scope and severity. The vulnerability has a CVSS score of 8.9 and is considered HIGH severity.

Defensive priority

Defenders should prioritize verifying exposure of GL-iNet GL-MT3000 devices running firmware up to 4.4.5 and assess the effectiveness of current compensating controls.

Recommended defensive actions

  • Verify exposure of GL-iNet GL-MT3000 devices running firmware up to 4.4.5
  • Assess the effectiveness of current compensating controls
  • Monitor for potential exploitation attempts
  • Review vendor-supported updates or mitigations through normal change control
  • Check relevant monitoring, detection, and logs for exposed assets
  • Track exceptions and retest remediated assets
  • Plan compensating controls for exposed systems while remediation is scheduled

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and affected product. Additional information is available from Vuldb. The vulnerability has been made public and could be used. Defenders should verify exposure of GL-iNet GL-MT3000 devices running firmware up to 4.4.5 and assess compensating controls. Evidence limits suggest verifying affected scope and vendor guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-18614 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-18614

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-18614 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-18614

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.