Ovarro TBox Uncontrolled Resource Consumption

published 2022-07-28 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-9778

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits: 0; none known

An attacker could use specially crafted invalid Modbus frames to crash the Ovarro TBox system.

Patch / fix

fixed in 8

ovarro twinsoft 12.4
ovarro tbox_lt2-530_firmware 1.46
ovarro tbox_lt2-532_firmware 1.46
ovarro tbox_lt2-540_firmware 1.46
ovarro tbox_ms-cpu32_firmware 1.46
ovarro tbox_ms-cpu32-s2_firmware 1.46
ovarro tbox_rm2_firmware 1.46
ovarro tbox_tg2_firmware 1.46

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-054-04 updated 2021-09-23 cvss 7.5

Ovarro TBox (Update A)

Ovarro TBox MS-CPU32 < 12.4 (firmware 1.46) Ovarro TBox MS-CPU32-S2 < 12.4 (firmware 1.46) Ovarro TBox RM2 (All models) < 12.4 (firmware 1.46) Ovarro TBox TG2 (All models) < 12.4 (firmware 1.46) Ovarro TBoxLT2 (All models) < 12.4 (firmware 1.46)
affected: mitigation “Ovarro recommends affected users update to 12.5 or later of TWinSoft to mitigate these vulnerabilities.” gcc02.safelinks.protection.outlook.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 18 mo ago (2025-04-17)

Exploit prediction

0.88% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Ovarro TBox

Classification

Weakness

CWE-400 Uncontrolled Resource Consumption

References

cisa.gov /uscert/ics/advisories/icsa-21-054-04
third-party-advisory, us-government-resource

Sources

CVE List CVE-2021-22642
NVD CVE-2021-22642

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary