CVE-2023-28386Network attack vector

Unauthenticated code execution via unsigned firmware

Published May 22, 2023 · Updated Jan 16, 2025

Improper firmware integrity validation in Snap One OvrC Pro 7.2 and earlier allows remote attackers to execute code via firmware uploads. The update path calculates only an MD5 digest and accepts firmware without verifying a cryptographic signature against a trusted public key. No authentication or user interaction is required, and successful exploitation replaces trusted device firmware with attacker-controlled code.

CVSS severity8.6
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper firmware integrity validation in Snap One OvrC Pro 7.2 and earlier allows remote attackers to execute code via firmware uploads. The update path calculates only an MD5 digest and accepts firmware without verifying a cryptographic signature against a trusted public key. No authentication or user interaction is required, and successful exploitation replaces trusted device firmware with attacker-controlled code.

The record

CVE
CVE-2023-28386
Published
May 22, 2023
Updated
Jan 16, 2025
Vendor
Snap One, LLC
Product
OvrC
Classifications
CWE-354, T1601.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 22, 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=0 <7.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Snap One, LLC · OvrCversion=0 <7.3

Published CVSS scores

8.6CISA ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

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-354Improper Validation of Integrity Check Value
T1601.001Patch System Image

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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