How severe is CVE-2021-22642?

CVE-2021-22642 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-22642 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22642?

CVE-2021-22642 primarily affects Ovarro Twinsoft. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-22642?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-22642 published?

CVE-2021-22642 was published on 2022-07-28 and last updated on 2026-06-17.

CVE-2021-22642

CVE-2021-22642 is a high-severity vulnerability in Ovarro Twinsoft with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Ovarro Twinsoft
Published: 2022-07-28
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2021-22642?: An attacker could use specially crafted invalid Modbus frames to crash the Ovarro TBox system.
How severe is CVE-2021-22642?: CVE-2021-22642 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-22642 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22642?: CVE-2021-22642 primarily affects Ovarro Twinsoft. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-22642?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-22642 published?: CVE-2021-22642 was published on 2022-07-28 and last updated on 2026-06-17.

References

https://www.cisa.gov/uscert/ics/advisories/icsa-21-054-04

Affected products (8)

cpe:2.3:a:ovarro:twinsoft:*:*:*:*:*:*:*:*
cpe:2.3:o:ovarro:tbox_lt2-530_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ovarro:tbox_lt2-532_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ovarro:tbox_lt2-540_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ovarro:tbox_ms-cpu32_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ovarro:tbox_ms-cpu32-s2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ovarro:tbox_rm2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ovarro:tbox_tg2_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Ovarro Twinsoft

CVE-2021-22648 — High (CVSS 8.8): Ovarro TBox proprietary Modbus file access functions allow attackers to read, alter, or delete the configuration file.
CVE-2021-22646 — High (CVSS 8.8): The “ipk” package containing the configuration created by TWinSoft can be uploaded, extracted, and executed in…
CVE-2021-22650 — High (CVSS 7.5): An attacker may use TWinSoft and a malicious source project file (TPG) to extract files on machine executing Ovarro…
CVE-2021-22644 — High (CVSS 7.5): Ovarro TBox TWinSoft uses the custom hardcoded user “TWinSoft” with a hardcoded key.
CVE-2021-22640 — High (CVSS 7.5): An attacker can decrypt the Ovarro TBox login password by communication capture and brute force attacks.

All CVEs affecting Ovarro Twinsoft →

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