Skip to content
Fencer Vulns
high 8.8

CVE-2023-39435 json

Zavio IP Camera Stack-Based Buffer Overflow

published 2023-11-08 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-43159

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits
0
none known

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-23-304-03 updated cvss 8.8

Zavio IP Camera

  • Zavio B8220 M2.1.6.05 Zavio B8520 M2.1.6.05 Zavio CB3211 M2.1.6.05 Zavio CB3212 M2.1.6.05 Zavio CB5220 M2.1.6.05 Zavio CB6231 M2.1.6.05
    +5 more products
    Zavio CD321 M2.1.6.05 Zavio CF7201 M2.1.6.05 Zavio CF7300 M2.1.6.05 Zavio CF7500 M2.1.6.05 Zavio CF7501 M2.1.6.05
    affected: no fix planned

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
21 mo ago

Exploit prediction

1.58% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Zavio IP Camera CF7500
  • Zavio IP Camera CF7300
  • Zavio IP Camera CF7201
  • Zavio IP Camera CF7501
  • Zavio IP Camera CB3211
  • Zavio IP Camera CB3212
  • Zavio IP Camera CB5220
  • Zavio IP Camera CB6231
  • Zavio IP Camera B8520
  • Zavio IP Camera B8220
  • Zavio IP Camera CD321

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.