CVE-2023-43755Network attack vector

Remote code execution via oversized XML fields

Published Nov 8, 2023 · Updated Jan 16, 2025

Stack-based buffer overflows in Zavio IP Cameras M2.1.6.05 allow remote attackers to execute arbitrary code through crafted network requests. XML request parsing copies fields into fixed-size stack buffers without adequately validating the allocated buffer size. The network interface is reachable without authentication or user interaction, and successful exploitation grants control of the camera or interrupts its service.

CVSS severity9.8
Critical
EPSS probability1.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflows in Zavio IP Cameras M2.1.6.05 allow remote attackers to execute arbitrary code through crafted network requests. XML request parsing copies fields into fixed-size stack buffers without adequately validating the allocated buffer size. The network interface is reachable without authentication or user interaction, and successful exploitation grants control of the camera or interrupts its service.

The record

CVE
CVE-2023-43755
Published
Nov 8, 2023
Updated
Jan 16, 2025
Vendor
Zavio
Product
IP Camera CD321
Classifications
CWE-121, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=version M2.1.6.05

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Zavio · IP Camera CD321version=version M2.1.6.05
Zavio · IP Camera CB3211version=version M2.1.6.05
Zavio · IP Camera CB3212version=version M2.1.6.05
Zavio · IP Camera CF7500version=version M2.1.6.05
Zavio · IP Camera CF7501version=version M2.1.6.05
Zavio · IP Camera CF7300version=version M2.1.6.05
Zavio · IP Camera B8220version=version M2.1.6.05
Zavio · IP Camera CB6231version=version M2.1.6.05
Zavio · IP Camera CF7201version=version M2.1.6.05
Zavio · IP Camera B8520version=version M2.1.6.05
Zavio · IP Camera CB5220version=version M2.1.6.05

Published CVSS scores

9.8CISACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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