CVE-2023-39435
Zavio
- Published
- 8 November 2023
- Last modified
- 17 June 2026
- CVSS
- 9.8 v3.1
- Severity
- critical
- EPSS
- 1.2% (67th pct)
- CISA KEV
- Not listed
- NVD status
- Modified
- Weaknesses
- CWE-121, CWE-787
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
Zavio CF7500, CF7300, CF7201, CF7501, CB3211, CB3212, CB5220, CB6231, B8520, B8220, and CD321 IP Cameras with firmware version M2.1.6.05 are vulnerable to stack-based overflows. During the process of updating certain settings sent from incoming network requests, the product does not sufficiently check or validate allocated buffer size. This may lead to remote code execution.
Exploitation
Not listed in the CISA Known Exploited Vulnerabilities catalogue as of 2026.09.04. That is an absence of confirmed public exploitation, not evidence that exploitation has not occurred. EPSS models a 1.2% probability of exploitation activity in the next 30 days.
Affected products
| Product | Vendor | Type | Versions named |
|---|---|---|---|
| B8220 | Zavio | unknown | m2.1.6.05 |
| B8520 | Zavio | unknown | m2.1.6.05 |
| CB3211 | Zavio | unknown | m2.1.6.05 |
| CB3212 | Zavio | unknown | m2.1.6.05 |
| CB5220 | Zavio | unknown | m2.1.6.05 |
| CB6231 | Zavio | unknown | m2.1.6.05 |
| CD321 | Zavio | unknown | m2.1.6.05 |
| CF7201 | Zavio | unknown | m2.1.6.05 |
| CF7300 | Zavio | unknown | m2.1.6.05 |
| CF7500 | Zavio | unknown | m2.1.6.05 |
| CF7501 | Zavio | unknown | m2.1.6.05 |
References
- https://www.cisa.gov/news-events/ics-advisories/icsa-23-304-03 third-party
- https://www.cisa.gov/news-events/ics-advisories/icsa-23-304-03 third-party
Record assembled from NVD, CISA KEV 2026.09.04 and FIRST EPSS 2026-09-04. Affected products are those NVD's CPE configuration names that fall inside this site's scope; a CVE may affect products outside it.