How severe is CVE-2023-0248?

CVE-2023-0248 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability low.

Is CVE-2023-0248 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-0248?

CVE-2023-0248 affects Johnsoncontrols Iosmart Gen 1 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-0248?

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-2023-0248 published?

CVE-2023-0248 was published on 2023-12-14 and last updated on 2026-06-17.

CVE-2023-0248

CVE-2023-0248 is a high-severity vulnerability in Johnsoncontrols Iosmart Gen 1 Firmware 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-401.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-401
Affected product: Johnsoncontrols Iosmart Gen 1 Firmware
Published: 2023-12-14
Last modified: 2026-06-17

Description

An attacker with physical access to the Kantech Gen1 ioSmart card reader with firmware version prior to 1.07.02 in certain circumstances can recover the reader's communication memory between the card and reader.

Frequently asked questions

What is CVE-2023-0248?: An attacker with physical access to the Kantech Gen1 ioSmart card reader with firmware version prior to 1.07.02 in certain circumstances can recover the reader's communication memory between the card and reader.
How severe is CVE-2023-0248?: CVE-2023-0248 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability low.
Is CVE-2023-0248 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-0248?: CVE-2023-0248 affects Johnsoncontrols Iosmart Gen 1 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-0248?: 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-2023-0248 published?: CVE-2023-0248 was published on 2023-12-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:johnsoncontrols:iosmart_gen_1_firmware:*:*:*:*:*:*:*:*

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