How severe is CVE-2020-12289?

CVE-2020-12289 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-12289 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12289?

CVE-2020-12289 primarily affects Intel Jhl6240 Thunderbolt 3 Firmware. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-12289?

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

When was CVE-2020-12289 published?

CVE-2020-12289 was published on 2021-06-09 and last updated on 2026-06-17.

CVE-2020-12289

CVE-2020-12289 is a medium-severity vulnerability in Intel Jhl6240 Thunderbolt 3 Firmware with a CVSS 3.x base score of 5.5. 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-787.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Intel Jhl6240 Thunderbolt 3 Firmware
Published: 2021-06-09
Last modified: 2026-06-17

Description

Out-of-bounds write in some Intel(R) Thunderbolt(TM) controllers may allow an authenticated user to potentially enable denial of service via local access.

Frequently asked questions

What is CVE-2020-12289?: Out-of-bounds write in some Intel(R) Thunderbolt(TM) controllers may allow an authenticated user to potentially enable denial of service via local access.
How severe is CVE-2020-12289?: CVE-2020-12289 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-12289 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12289?: CVE-2020-12289 primarily affects Intel Jhl6240 Thunderbolt 3 Firmware. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-12289?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-12289 published?: CVE-2020-12289 was published on 2021-06-09 and last updated on 2026-06-17.

References

https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00401.html

Affected products (13)

cpe:2.3:o:intel:jhl6240_thunderbolt_3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:jhl6340_thunderbolt_3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:jhl6540_thunderbolt_3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:jhl7040_thunderbolt_3_retimer_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:jhl7340_thunderbolt_3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:jhl7440_thunderbolt_3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:jhl7540_thunderbolt_3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:jhl8010r_usb_retimer_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:dsl5320_thunderbolt_2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:dsl5520_thunderbolt_2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:dsl6340_thunderbolt_3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:dsl6540_thunderbolt_3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:intel:jhl8040r_thunderbolt_4_retimer_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Intel Jhl6240 Thunderbolt 3 Firmware

CVE-2020-12296 — Medium (CVSS 5.5): Uncontrolled resource consumption in some Intel(R) Thunderbolt(TM) controllers may allow an authenticated user to…
CVE-2020-12295 — Medium (CVSS 5.5): Improper input validation in some Intel(R) Thunderbolt(TM) controllers may allow an authenticated user to potentially…
CVE-2020-12294 — Medium (CVSS 5.5): Insufficient control flow management in some Intel(R) Thunderbolt(TM) controllers may allow an authenticated user to…
CVE-2020-12293 — Medium (CVSS 5.5): Improper control of a resource through its lifetime in some Intel(R) Thunderbolt(TM) controllers may allow an…
CVE-2020-12292 — Medium (CVSS 5.5): Improper conditions check in some Intel(R) Thunderbolt(TM) controllers may allow an authenticated user to potentially…
CVE-2020-12291 — Medium (CVSS 5.5): Uncontrolled resource consumption in some Intel(R) Thunderbolt(TM) controllers may allow an authenticated user to…

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