CVE-2025-62864: Amperecomputing Ampereone A192-26x Firmware buffer overflow (CVSS 9.8)

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.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Amperecomputing Ampereone A128-34x Firmware< 4.4.5.2

Amperecomputing Ampereone A144-24x Firmware< 4.4.5.2

Amperecomputing Ampereone A144-26m Firmware< 5.4.5.1

Amperecomputing Ampereone A144-27x Firmware< 4.4.5.2

Amperecomputing Ampereone A144-33m Firmware< 5.4.5.1

Amperecomputing Ampereone A160-28m Firmware< 5.4.5.1

Amperecomputing Ampereone A160-28x Firmware< 4.4.5.2

Amperecomputing Ampereone A192-26m Firmware< 5.4.5.1

Amperecomputing Ampereone A192-26x Firmware< 3.5.9.3 · < 4.4.5.2

Amperecomputing Ampereone A192-32m Firmware< 5.4.5.1

Amperecomputing Ampereone A192-32x Firmware< 3.5.9.3

Amperecomputing Ampereone A96-36m Firmware< 5.4.5.1

Amperecomputing Ampereone A96-36x Firmware< 4.4.5.2

Remediation

Fixed in

Amperecomputing Ampereone A128-34x Firmware≥ 4.4.5.2

Amperecomputing Ampereone A144-24x Firmware≥ 4.4.5.2

Amperecomputing Ampereone A144-26m Firmware≥ 5.4.5.1

Amperecomputing Ampereone A144-27x Firmware≥ 4.4.5.2

Amperecomputing Ampereone A144-33m Firmware≥ 5.4.5.1

Amperecomputing Ampereone A160-28m Firmware≥ 5.4.5.1

Amperecomputing Ampereone A160-28x Firmware≥ 4.4.5.2

Amperecomputing Ampereone A192-26m Firmware≥ 5.4.5.1

Amperecomputing Ampereone A192-26x Firmware≥ 3.5.9.3

Amperecomputing Ampereone A192-32m Firmware≥ 5.4.5.1

Patch & vendor advisories

References

https://amperecomputing.com/products/product-securityVendor Advisory
https://amperecomputing.com/products/security-bulletins/amp-sb-0007Vendor Advisory

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2025-62864 being actively exploited?

CVE-2025-62864 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.36%.

How severe is CVE-2025-62864?

CVE-2025-62864 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.36% probability of exploitation.

Which products are affected by CVE-2025-62864?

Affected products include Amperecomputing Ampereone A128-34x Firmware, Amperecomputing Ampereone A144-24x Firmware, Amperecomputing Ampereone A144-26m Firmware, Amperecomputing Ampereone A144-27x Firmware, Amperecomputing Ampereone A144-33m Firmware, and 8 more.

How do I fix CVE-2025-62864?

Upgrade affected software to a fixed version, for example Amperecomputing Ampereone A128-34x Firmware 4.4.5.2, Amperecomputing Ampereone A144-24x Firmware 4.4.5.2, Amperecomputing Ampereone A144-26m Firmware 5.4.5.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-62864 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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