CVE-2023-3959
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 multiple instances of stack-based overflows.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 48.8%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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 multiple instances of stack-based overflows. While processing XML elements from incoming network requests, the product does not sufficiently check or validate allocated buffer size. This may lead to remote code execution.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 48.77% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-121, CWE-787
- Affected
- zavio/cf7500 firmware · zavio/cf7300 firmware · zavio/cf7201 firmware · zavio/cf7501 firmware · zavio/cb3211 firmware · zavio/cb3212 firmware · zavio/cb5220 firmware · zavio/cb6231 firmware · zavio/b8520 firmware · zavio/b8220 firmware · zavio/cd321 firmware
- Source
- ics-cert@hq.dhs.gov
EPSS 48.8% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://www.cisa.gov/news-events/ics-advisories/icsa-23-304-03Third Party Advisory, US Government Resource
- https://www.cisa.gov/news-events/ics-advisories/icsa-23-304-03Third Party Advisory, US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.