How severe is CVE-2023-48121?

CVE-2023-48121 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 low, integrity none, and availability none.

Is CVE-2023-48121 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-48121?

CVE-2023-48121 primarily affects Ezviz Cs-c6n-a0-1c2wfr Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-48121?

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

When was CVE-2023-48121 published?

CVE-2023-48121 was published on 2023-11-28 and last updated on 2026-06-17.

CVE-2023-48121

CVE-2023-48121 is a medium-severity vulnerability in Ezviz Cs-c6n-a0-1c2wfr 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-287.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Ezviz Cs-c6n-a0-1c2wfr Firmware
Published: 2023-11-28
Last modified: 2026-06-17

Description

An authentication bypass vulnerability in the Direct Connection Module in Ezviz CS-C6N-xxx prior to v5.3.x build 20230401, Ezviz CS-CV310-xxx prior to v5.3.x build 20230401, Ezviz CS-C6CN-xxx prior to v5.3.x build 20230401, Ezviz CS-C3N-xxx prior to v5.3.x build 20230401 allows remote attackers to obtain sensitive information by sending crafted messages to the affected devices.

Frequently asked questions

What is CVE-2023-48121?: An authentication bypass vulnerability in the Direct Connection Module in Ezviz CS-C6N-xxx prior to v5.3.x build 20230401, Ezviz CS-CV310-xxx prior to v5.3.x build 20230401, Ezviz CS-C6CN-xxx prior to v5.3.x build 20230401, Ezviz CS-C3N-xxx prior to v5.3.x build 20230401 allows remote attackers to obtain sensitive information by sending crafted messages to the affected devices.
How severe is CVE-2023-48121?: CVE-2023-48121 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 low, integrity none, and availability none.
Is CVE-2023-48121 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-48121?: CVE-2023-48121 primarily affects Ezviz Cs-c6n-a0-1c2wfr Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-48121?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-48121 published?: CVE-2023-48121 was published on 2023-11-28 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:o:ezviz:cs-c6n-a0-1c2wfr_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:ezviz:cs-cv310-a0-1c2wfr_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:ezviz:cs-c6cn-a0-3h2wfr_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:ezviz:cs-c3n-a0-3h2wfrl_firmware:-:*:*:*:*:*:*:*

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Other CWE-287 (Improper Authentication) vulnerabilities

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CVE-2026-42822 — Critical (CVSS 10.0): Improper authentication in Azure Local Disconnected Operations allows an unauthorized attacker to elevate privileges…
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