How severe is CVE-2023-39807?

CVE-2023-39807 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-39807 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-39807?

CVE-2023-39807 affects Nvki Intelligent Broadband Subscriber Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-39807?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-39807 published?

CVE-2023-39807 was published on 2023-08-21 and last updated on 2026-07-05.

CVE-2023-39807

CVE-2023-39807 is a critical-severity vulnerability in Nvki Intelligent Broadband Subscriber Gateway with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-89.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-89
Affected product: Nvki Intelligent Broadband Subscriber Gateway
Published: 2023-08-21
Last modified: 2026-07-05

Description

N.V.K.INTER CO., LTD. (NVK) iBSG v3.5 was discovered to contain a SQL injection vulnerability via the a_passwd parameter at /portal/user-register.php.

Frequently asked questions

What is CVE-2023-39807?: N.V.K.INTER CO., LTD. (NVK) iBSG v3.5 was discovered to contain a SQL injection vulnerability via the a_passwd parameter at /portal/user-register.php.
How severe is CVE-2023-39807?: CVE-2023-39807 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-39807 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-39807?: CVE-2023-39807 affects Nvki Intelligent Broadband Subscriber Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-39807?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-39807 published?: CVE-2023-39807 was published on 2023-08-21 and last updated on 2026-07-05.

References

Affected products (1)

cpe:2.3:a:nvki:intelligent_broadband_subscriber_gateway:3.5:*:*:*:*:*:*:*

More vulnerabilities in Nvki Intelligent Broadband Subscriber Gateway

CVE-2023-39809 — Critical (CVSS 9.8): N.V.K.INTER CO., LTD. (NVK) iBSG v3.5 was discovered to contain an OS command injection vulnerability via shell…
CVE-2023-39808 — Critical (CVSS 9.8): N.V.K.INTER CO., LTD. (NVK) iBSG v3.5 was discovered to contain a hardcoded root password that allows attackers to…

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