CVE-2021-22646Network attack vector

Authenticated code execution via malicious update packages

Published Jul 28, 2022 · Updated Apr 17, 2025

Code injection in Ovarro TBox firmware 1.44 and earlier allows remote authenticated users to execute malicious code via update packages. The proprietary Modbus update functions accept an attacker-supplied IPK configuration package, then extract, install, and execute it without enforcing a trusted signature. The package-update path is required; with user protection enabled, exploitation requires the highest access level and a race with a legitimate update.

CVSS severity8.8
High
EPSS probability1.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Code injection in Ovarro TBox firmware 1.44 and earlier allows remote authenticated users to execute malicious code via update packages. The proprietary Modbus update functions accept an attacker-supplied IPK configuration package, then extract, install, and execute it without enforcing a trusted signature. The package-update path is required; with user protection enabled, exploitation requires the highest access level and a race with a legitimate update.

The record

CVE
CVE-2021-22646
Published
Jul 28, 2022
Updated
Apr 17, 2025
Vendor
Ovarro
Product
TBox
Classifications
CWE-94, T0866
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 17, 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=LT2
  2. Affected versionversion=MS-CPU32
  3. Affected versionversion=MS-CPU32-S2
  4. Affected versionversion=RM2
  5. Affected versionversion=TG2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Ovarro · TBoxversion=LT2; version=MS-CPU32; version=MS-CPU32-S2; version=RM2; version=TG2

Published CVSS scores

8.8ICS-CERTCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T0866Exploitation of Remote Services

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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