How severe is CVE-2025-27243?

CVE-2025-27243 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-27243 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-27243?

CVE-2025-27243 affects Intel Ethernet Controller. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-27243?

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

Does CVE-2025-27243 have an EU (EUVD) identifier?

Yes. CVE-2025-27243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207270.

When was CVE-2025-27243 published?

CVE-2025-27243 was published on 2026-02-10 and last updated on 2026-06-17.

CVE-2025-27243

CVE-2025-27243 is a medium-severity vulnerability in Intel Ethernet Controller with a CVSS 3.x base score of 6.0. 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 6.0)
CVSS v4: 6.7
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-207270
Weakness: CWE-787
Affected product: Intel Ethernet Controller
Published: 2026-02-10
Last modified: 2026-06-17

Description

Out-of-bounds write in the firmware for some Intel(R) Ethernet Controller E810 before version cvl fw 1.7.8.x within Ring 0: Bare Metal OS may allow a denial of service. System software adversary with a privileged user combined with a low complexity attack may enable denial of service. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.

Frequently asked questions

What is CVE-2025-27243?: Out-of-bounds write in the firmware for some Intel(R) Ethernet Controller E810 before version cvl fw 1.7.8.x within Ring 0: Bare Metal OS may allow a denial of service. System software adversary with a privileged user combined with a low complexity attack may enable denial of service. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.
How severe is CVE-2025-27243?: CVE-2025-27243 has a CVSS 3.x base score of 6.0, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-27243 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-27243?: CVE-2025-27243 affects Intel Ethernet Controller. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-27243?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-27243 have an EU (EUVD) identifier?: Yes. CVE-2025-27243 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-207270.
When was CVE-2025-27243 published?: CVE-2025-27243 was published on 2026-02-10 and last updated on 2026-06-17.

References

https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01171.html

Affected products (1)

cpe:2.3:a:intel:ethernet_controller:*:*:*:*:*:*:*:*

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