How severe is CVE-2023-33383?

CVE-2023-33383 has a CVSS 3.x base score of 5.3, rated medium 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 low.

Is CVE-2023-33383 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-33383?

CVE-2023-33383 affects Shelly Pro 4pm Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-33383?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-33383 published?

CVE-2023-33383 was published on 2023-08-02 and last updated on 2026-06-17.

CVE-2023-33383

CVE-2023-33383 is a medium-severity vulnerability in Shelly Pro 4pm Firmware with a CVSS 3.x base score of 5.3. 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-125.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 2% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Shelly Pro 4pm Firmware
Published: 2023-08-02
Last modified: 2026-06-17

Description

Shelly 4PM Pro four-channel smart switch 0.11.0 allows an attacker to trigger a BLE out of bounds read fault condition that results in a device reload.

Frequently asked questions

What is CVE-2023-33383?: Shelly 4PM Pro four-channel smart switch 0.11.0 allows an attacker to trigger a BLE out of bounds read fault condition that results in a device reload.
How severe is CVE-2023-33383?: CVE-2023-33383 has a CVSS 3.x base score of 5.3, rated medium 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 low.
Is CVE-2023-33383 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-33383?: CVE-2023-33383 affects Shelly Pro 4pm Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-33383?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-33383 published?: CVE-2023-33383 was published on 2023-08-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:shelly:pro_4pm_firmware:0.11.0:*:*:*:*:*:*:*

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