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Review reviewCritical

CVE-2023-39809

intelligent broadband subscriber gateway

N.V.K.INTER CO., LTD. (NVK) iBSG v3.5 was discovered to contain an OS command injection vulnerability via shell metacharacters in the system_hostname parameter at /manage/network-basic.php.

CVSS
9.8
EPSS
1.27%
66.9% percentile
CISA KEV
Not listed
Published
2023.08.21
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability1.27%
Technical severityCVSS 9.8

Vulnerability overview

N.V.K.INTER CO., LTD. (NVK) iBSG v3.5 was discovered to contain an OS command injection vulnerability via shell metacharacters in the system_hostname parameter at /manage/network-basic.php.

Affected product and versions

Product
intelligent broadband subscriber gateway
Affected versions
3.5
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that intelligent broadband subscriber gateway and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-77
CVE-2023-39809 — intelligent broadband subscriber gateway | SECUFOCUS NOW