CVE-2022-28743Network attack vector

Root code execution via firmware validation race

Published Apr 21, 2022 · Updated Aug 3, 2024

A TOCTOU race in Foscam R2C firmware through System 1.13.1.6 and Application 2.91.2.66 allows remote authenticated users to execute arbitrary code. The firmware-update path validates an uploaded update and later installs from the same mutable input, allowing a malicious patch to replace the checked content before use. Administrator access to the network update interface is required; successful exploitation grants root control of the camera and access to its live stream.

CVSS severity6.6
Medium
EPSS probability1.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A TOCTOU race in Foscam R2C firmware through System 1.13.1.6 and Application 2.91.2.66 allows remote authenticated users to execute arbitrary code. The firmware-update path validates an uploaded update and later installs from the same mutable input, allowing a malicious patch to replace the checked content before use. Administrator access to the network update interface is required; successful exploitation grants root control of the camera and access to its live stream.

The record

CVE
CVE-2022-28743
Published
Apr 21, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-367, T1068
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 21, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.1MITRECVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
6.6NVDCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
8.5NVDAV:N/AC:M/Au:S/C:C/I:C/A:C

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
T1068Exploitation for Privilege Escalation

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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