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CVE-2023-3959

54
FAUCET Score

CVE-2023-3959 is a critical vulnerability affecting multiple Zavio IP camera models with firmware version M2.1.6.05. It involves multiple stack-based overflows due to insufficient buffer size validation when processing XML elements in network requests. This flaw carries a CVSS score of 9.8 (Critical), indicating a high potential for unauthenticated remote code execution with no user interaction required. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion and media coverage, suggesting awareness among researchers.

Impacted Technologies

VendorProductVersion(s)CPE
m2.1.6.05CPE matchmatch criteria
cpe:2.3:o:zavio:cf7500_firmware:m2.1.6.05:*:*:*:*:*:*:*
m2.1.6.05CPE matchmatch criteria
cpe:2.3:o:zavio:cf7300_firmware:m2.1.6.05:*:*:*:*:*:*:*
m2.1.6.05CPE matchmatch criteria
cpe:2.3:o:zavio:cf7201_firmware:m2.1.6.05:*:*:*:*:*:*:*
m2.1.6.05CPE matchmatch criteria
cpe:2.3:o:zavio:cf7501_firmware:m2.1.6.05:*:*:*:*:*:*:*
m2.1.6.05CPE matchmatch criteria
cpe:2.3:o:zavio:cb3211_firmware:m2.1.6.05:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
40.40%
Probability of exploitation in next 30 days
EPSS Percentile
98.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.4040 is in the 96th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cisa.gov / news-events/ics-advisories/icsa-23-304-03
Third Party AdvisoryUS Government Resource