How severe is CVE-2023-33377?

CVE-2023-33377 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-33377 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-33377?

CVE-2023-33377 affects Connectedio Connected Io. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-33377?

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

When was CVE-2023-33377 published?

CVE-2023-33377 was published on 2023-08-04 and last updated on 2026-06-17.

CVE-2023-33377

CVE-2023-33377 is a critical-severity vulnerability in Connectedio Connected Io with a CVSS 3.x base score of 9.8. 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 2% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Connectedio Connected Io
Published: 2023-08-04
Last modified: 2026-06-17

Description

Connected IO v2.1.0 and prior has an OS command injection vulnerability in the set firewall command in part of its communication protocol, enabling attackers to execute arbitrary OS commands on devices.

Frequently asked questions

What is CVE-2023-33377?: Connected IO v2.1.0 and prior has an OS command injection vulnerability in the set firewall command in part of its communication protocol, enabling attackers to execute arbitrary OS commands on devices.
How severe is CVE-2023-33377?: CVE-2023-33377 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-33377 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-33377?: CVE-2023-33377 affects Connectedio Connected Io. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-33377?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-33377 published?: CVE-2023-33377 was published on 2023-08-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:connectedio:connected_io:*:*:*:*:*:*:*:*

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