How severe is CVE-2022-38546?

CVE-2022-38546 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2022-38546 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-38546?

CVE-2022-38546 affects Zyxel Nbg7510 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-38546?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-38546 published?

CVE-2022-38546 was published on 2022-12-21 and last updated on 2026-06-17.

CVE-2022-38546

CVE-2022-38546 is a medium-severity vulnerability in Zyxel Nbg7510 Firmware with a CVSS 3.x base score of 5.3. 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-284.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Zyxel Nbg7510 Firmware
Published: 2022-12-21
Last modified: 2026-06-17

Description

A DNS misconfiguration was found in Zyxel NBG7510 firmware versions prior to V1.00(ABZY.3)C0, which could allow an unauthenticated attacker to access the DNS server when the device is switched to the AP mode.

Frequently asked questions

What is CVE-2022-38546?: A DNS misconfiguration was found in Zyxel NBG7510 firmware versions prior to V1.00(ABZY.3)C0, which could allow an unauthenticated attacker to access the DNS server when the device is switched to the AP mode.
How severe is CVE-2022-38546?: CVE-2022-38546 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2022-38546 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-38546?: CVE-2022-38546 affects Zyxel Nbg7510 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-38546?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-38546 published?: CVE-2022-38546 was published on 2022-12-21 and last updated on 2026-06-17.

References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-dns-misconfiguration-in-nbg7510-home-router

Affected products (1)

cpe:2.3:o:zyxel:nbg7510_firmware:*:*:*:*:*:*:*:*

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