How severe is CVE-2025-62864?

CVE-2025-62864 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-62864 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-2025-62864?

CVE-2025-62864 primarily affects Amperecomputing Ampereone A192-32m 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-2025-62864?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-62864 have an EU (EUVD) identifier?

Yes. CVE-2025-62864 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203817.

When was CVE-2025-62864 published?

CVE-2025-62864 was published on 2025-12-16 and last updated on 2026-06-17.

CVE-2025-62864

CVE-2025-62864 is a critical-severity vulnerability in Amperecomputing Ampereone A192-32m Firmware with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-203817
Weakness: CWE-787
Affected product: Amperecomputing Ampereone A192-32m Firmware
Published: 2025-12-16
Last modified: 2026-06-17

Description

Ampere AmpereOne AC03 devices before 3.5.9.3, AmpereOne AC04 devices before 4.4.5.2, and AmpereOne M devices before 5.4.5.1 allow an incorrectly formed SMC call to UEFI-MM MMCommunicate service that could result in an out-of-bounds write within the UEFI-MM Secure Partition context.

Frequently asked questions

What is CVE-2025-62864?: Ampere AmpereOne AC03 devices before 3.5.9.3, AmpereOne AC04 devices before 4.4.5.2, and AmpereOne M devices before 5.4.5.1 allow an incorrectly formed SMC call to UEFI-MM MMCommunicate service that could result in an out-of-bounds write within the UEFI-MM Secure Partition context.
How severe is CVE-2025-62864?: CVE-2025-62864 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-62864 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-2025-62864?: CVE-2025-62864 primarily affects Amperecomputing Ampereone A192-32m 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-2025-62864?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-62864 have an EU (EUVD) identifier?: Yes. CVE-2025-62864 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203817.
When was CVE-2025-62864 published?: CVE-2025-62864 was published on 2025-12-16 and last updated on 2026-06-17.

References

Affected products (13)

cpe:2.3:o:amperecomputing:ampereone_a192-32m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amperecomputing:ampereone_a192-26m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amperecomputing:ampereone_a160-28m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amperecomputing:ampereone_a144-33m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amperecomputing:ampereone_a144-26m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amperecomputing:ampereone_a96-36m_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amperecomputing:ampereone_a96-36x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amperecomputing:ampereone_a128-34x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amperecomputing:ampereone_a144-24x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amperecomputing:ampereone_a144-27x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amperecomputing:ampereone_a160-28x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amperecomputing:ampereone_a192-26x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amperecomputing:ampereone_a192-32x_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Amperecomputing Ampereone A192-32m Firmware

CVE-2025-62863 — Critical (CVSS 9.8): Ampere AmpereOne AC03 devices before 3.5.9.3, AmpereOne AC04 devices before 4.4.5.2, and AmpereOne M devices before…
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