How severe is CVE-2023-1966?

CVE-2023-1966 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over physical access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-1966 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-1966?

CVE-2023-1966 primarily affects Illumina Iscan Firmware. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-1966?

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-2023-1966 published?

CVE-2023-1966 was published on 2023-04-28 and last updated on 2026-06-17.

CVE-2023-1966

CVE-2023-1966 is a high-severity vulnerability in Illumina Iscan Firmware with a CVSS 3.x base score of 7.4. 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-269.

Key facts

Severity: High (CVSS 3.x base score 7.4)
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-269
Affected product: Illumina Iscan Firmware
Published: 2023-04-28
Last modified: 2026-06-17

Description

Instruments with Illumina Universal Copy Service v1.x and v2.x contain an unnecessary privileges vulnerability. An unauthenticated malicious actor could upload and execute code remotely at the operating system level, which could allow an attacker to change settings, configurations, software, or access sensitive data on the affected product.

Frequently asked questions

What is CVE-2023-1966?: Instruments with Illumina Universal Copy Service v1.x and v2.x contain an unnecessary privileges vulnerability. An unauthenticated malicious actor could upload and execute code remotely at the operating system level, which could allow an attacker to change settings, configurations, software, or access sensitive data on the affected product.
How severe is CVE-2023-1966?: CVE-2023-1966 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over physical access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-1966 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-1966?: CVE-2023-1966 primarily affects Illumina Iscan Firmware. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-1966?: 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-2023-1966 published?: CVE-2023-1966 was published on 2023-04-28 and last updated on 2026-06-17.

References

Affected products (15)

cpe:2.3:o:illumina:iscan_firmware:4.0.0:*:*:*:*:*:*:*
cpe:2.3:o:illumina:iscan_firmware:4.0.5:*:*:*:*:*:*:*
cpe:2.3:o:illumina:iseq_100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:illumina:miniseq_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:illumina:miseq_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:illumina:miseqdx_firmware:*:*:*:*:-:*:*:*
cpe:2.3:o:illumina:miseqdx_firmware:4.0:*:*:*:ruo:*:*:*
cpe:2.3:o:illumina:nextseq_500_firmware:4.0:*:*:*:*:*:*:*
cpe:2.3:o:illumina:nextseq_550_firmware:4.0:*:*:*:*:*:*:*
cpe:2.3:o:illumina:nextseq_550dx_firmware:*:*:*:*:-:*:*:*
cpe:2.3:o:illumina:nextseq_550dx_firmware:4.0:*:*:*:ruo:*:*:*
cpe:2.3:o:illumina:nextseq_1000_firmware:1.4.1:*:*:*:*:*:*:*
cpe:2.3:o:illumina:nextseq_2000_firmware:1.4.1:*:*:*:*:*:*:*
cpe:2.3:o:illumina:novaseq_6000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:illumina:novaseq_6000_firmware:1.8:*:*:*:*:*:*:*

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