CVE-2021-22648 | Ovarro TBox Incorrect Permission Assignment for Critical Resource

Ovarro TBox proprietary Modbus file access functions allow attackers to read, alter, or delete the configuration file.

Published: 2022-07-28 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-22648 is rated Moderate Risk (52.9/100): CVSS High severity, with low exploitation likelihood (EPSS 0.72%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-22648

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.15% 0.72% +0.57%
2 2025-07-29 0.06% 0.15% +0.09%
3 2025-03-30 — 0.06% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-22648

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2021-22648

Affected software / configurations for CVE-2021-22648

Vendor Product Version Raw CPE
ovarro twinsoft < 12.4 cpe:2.3:a:ovarro:twinsoft:*:*:*:*:*:*:*:*
ovarro tbox_lt2-530_firmware < 1.46 cpe:2.3:o:ovarro:tbox_lt2-530_firmware:*:*:*:*:*:*:*:*
ovarro tbox_lt2-532_firmware < 1.46 cpe:2.3:o:ovarro:tbox_lt2-532_firmware:*:*:*:*:*:*:*:*
ovarro tbox_lt2-540_firmware < 1.46 cpe:2.3:o:ovarro:tbox_lt2-540_firmware:*:*:*:*:*:*:*:*
ovarro tbox_ms-cpu32_firmware < 1.46 cpe:2.3:o:ovarro:tbox_ms-cpu32_firmware:*:*:*:*:*:*:*:*
ovarro tbox_ms-cpu32-s2_firmware < 1.46 cpe:2.3:o:ovarro:tbox_ms-cpu32-s2_firmware:*:*:*:*:*:*:*:*
ovarro tbox_rm2_firmware < 1.46 cpe:2.3:o:ovarro:tbox_rm2_firmware:*:*:*:*:*:*:*:*
ovarro tbox_tg2_firmware < 1.46 cpe:2.3:o:ovarro:tbox_tg2_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-22648

URL Tags
https://www.cisa.gov/uscert/ics/advisories/icsa-21-054-04 Third Party Advisory US Government Resource
cvelogic Threat Intelligence