Stack-Based Buffer Overflow Vulnerability in the EZVIZ Motion Detection component
Noroxi assessment
Priority: Monitor (action score 39/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 1.5% (FIRST EPSS); higher than 74.1% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
- According to the record, no fixed version is available yet.
Low priority for now. Update when a fix is released; follow the vendor's advisory.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Stack-based Buffer Overflow vulnerability in the EZVIZ Motion Detection component as used in camera models CS-CV248, CS-C6N-A0-1C2WFR, CS-DB1C-A0-1E2W2FR, CS-C6N-B0-1G2WF, CS-C3W-A0-3H4WFRL allows a remote attacker to execute remote code on the device. This issue affects: EZVIZ CS-CV248 versions prior to 5.2.3 build 220725. EZVIZ CS-C6N-A0-1C2WFR versions prior to 5.3.0 build 220428. EZVIZ CS-DB1C-A0-1E2W2FR versions prior to 5.3.0 build 220802. EZVIZ CS-C6N-B0-1G2WF versions prior to 5.3.0 build 220712. EZVIZ CS-C3W-A0-3H4WFRL versions prior to 5.3.5 build 220723.
- Published
- Sep 15, 2022
- Updated
- Jun 17, 2026
- EPSS
- 1.5% · 74th percentile
- CWE
- CWE-121
Report tools
Action score
39
Monitor
Low priority for now.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.5%
CNA vs NVD score
- NVD
- 9.8
- CNA · Bitdefender
- 9.9
- 0.1 point gap
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- No fixed version yet
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| ezviz | cs-c6n-a0-1c2wfr firmware | cpe:2.3:o:ezviz:cs-c6n-a0-1c2wfr_firmware |
| ezviz | cs-c6n-a0-1c2wfr | cpe:2.3:h:ezviz:cs-c6n-a0-1c2wfr |
| ezviz | cs-db1c-a0-1e2w2fr firmware | cpe:2.3:o:ezviz:cs-db1c-a0-1e2w2fr_firmware |
| ezviz | cs-db1c-a0-1e2w2fr | cpe:2.3:h:ezviz:cs-db1c-a0-1e2w2fr |
| ezviz | cs-c6n-b0-1g2wf firmware | cpe:2.3:o:ezviz:cs-c6n-b0-1g2wf_firmware |
| ezviz | cs-c6n-b0-1g2wf | cpe:2.3:h:ezviz:cs-c6n-b0-1g2wf |
| ezviz | cs-c3w-a0-3h4wfrl firmware | cpe:2.3:o:ezviz:cs-c3w-a0-3h4wfrl_firmware |
| ezviz | cs-c3w-a0-3h4wfrl | cpe:2.3:h:ezviz:cs-c3w-a0-3h4wfrl |
| ezviz | cs-cv248 firmware | cpe:2.3:o:ezviz:cs-cv248_firmware |
| ezviz | cs-cv248 | cpe:2.3:h:ezviz:cs-cv248 |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- ezviz cs-c3w-a0-3h4wfrl firmware5.3.5
- ezviz cs-c6n-a0-1c2wfr firmware5.3.0
- ezviz cs-c6n-b0-1g2wf firmware5.3.0
- ezviz cs-cv248 firmware5.2.1
- ezviz cs-db1c-a0-1e2w2fr firmware5.3.0
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Bitdefender). Independent of NVD's CPE analysis and usually ahead of it.
EZVIZ CS-C3W-A0-3H4WFRL
- unspecified and later · before 5.3.5 build 220723affected
EZVIZ CS-C6N-A0-1C2WFR
- unspecified and later · before 5.3.0 build 220428affected
EZVIZ CS-C6N-B0-1G2WF
- unspecified and later · before 5.3.0 build 220712affected
EZVIZ CS-CV248
- unspecified and later · before 5.2.3 build 220725affected
EZVIZ CS-DB1C-A0-1E2W2FR
- unspecified and later · before 5.3.0 build 220802affected
Same product
ezviz: all recordsOther highest-scoring records for the same primary product.
- CVE-2022-2472Improper Initialization vulnerability in local server authentication logic22Monitor
- CVE-2023-48121An authentication bypass vulnerability in the Direct Connection Module in Ezviz CS-C6N-xxx prior to v5.3.x build 20230401, Ezviz CS-CV310-xx21Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-121 · Stack-based Buffer OverflowCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.