What is CVE-2023-34551?

CVE-2023-34551 is a high-severity vulnerability in Ezviz Cs-C6n-A0-1c2wfr-Mul, classified under Out-of-bounds Write. CVSS score: 8.0/10. Published 2023-08-01.

How severe is CVE-2023-34551?

High severity. CVSS v3 base score is 8.0 out of 10.

Is CVE-2023-34551 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Ezviz Cs-C6n-A0-1c2wfr-Mul

CVE-2023-34551

In certain EZVIZ products, two stack buffer overflows in netClientSetWlanCfg function of the EZVIZ SDK command server can allow an authenticated attacker present on the same local network as the camera to achieve remote code execution. This affects CS-C6N-B0-1G2WF Firmware versions before V5.3.0 build 230215 and CS-C6N-R101-1G2WF Firmware versions before V5.3.0 build 230215 and CS-CV310-A0-1B2WFR Firmware versions before V5.3.0 build 230221 and CS-CV310-A0-1C2WFR-C Firmware versions before V5.3.2 build 230221 and CS-C6N-A0-1C2WFR-MUL Firmware versions before V5.3.2 build 230218 and CS-CV310-A0-3C2WFRL-1080p Firmware versions before V5.2.7 build 230302 and CS-CV310-A0-1C2WFR Wifi IP66 2.8mm 1080p Firmware versions before V5.3.2 build 230214 and CS-CV248-A0-32WMFR Firmware versions before V5.2.3 build 230217 and EZVIZ LC1C Firmware versions before V5.3.4 build 230214. The impact is: execute arbitrary code (remote).

Vulnerability class: Buffer Overflow

Published 2023-08-01 · last modified 2026-07-09.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (42.3th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

infobyte/ezviz_

References

af854a3a-2127-422b-91ae-364da2661108 (Product)
www.ezviz.com/data-security/security-notice/detail/827 (Vendor Advisory)

Frequently asked questions

What is CVE-2023-34551?: CVE-2023-34551 is a high-severity vulnerability in Ezviz Cs-C6n-A0-1c2wfr-Mul, classified under Out-of-bounds Write. CVSS score: 8.0/10. Published 2023-08-01.
How severe is CVE-2023-34551?: High severity. CVSS v3 base score is 8.0 out of 10.
Is CVE-2023-34551 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.