Ampere AmpereOne AC03/AmpereOne AC04/AmpereOne M prior 3.5.9.3/4.4.5.2/5.4.5.1 UEFI-MM MMCommunicate Service out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Ampere AmpereOne AC03, AmpereOne AC04 and AmpereOne M. It has been classified as critical. The impacted element is an unknown function of the component UEFI-MM MMCommunicate Service. Performing a manipulation results in out-of-bounds write. This vulnerability is known as CVE-2025-62864. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in Ampere AmpereOne AC03, AmpereOne AC04 and AmpereOne M. This affects an unknown code block of the component UEFI-MM MMCommunicate Service. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at amperecomputing.com. This vulnerability is uniquely identified as CVE-2025-62864 since 10/24/2025. The exploitability is told to be easy. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 3.5.9.3, 4.4.5.2 or 5.4.5.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-203817). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.6

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: AmpereOne AC03/AmpereOne AC04/AmpereOne M 3.5.9.3/4.4.5.2/5.4.5.1

Timelineinfo

10/24/2025 CVE reserved
12/16/2025 +53 days Advisory disclosed
12/16/2025 +0 days VulDB entry created
12/17/2025 +1 days VulDB entry last update

Sourcesinfo

Advisory: amperecomputing.com
Status: Confirmed

CVE: CVE-2025-62864 (🔒)
GCVE (CVE): GCVE-0-2025-62864
GCVE (VulDB): GCVE-100-336915
EUVD: 🔒

Entryinfo

Created: 12/16/2025 21:44
Updated: 12/17/2025 16:09
Changes: 12/16/2025 21:44 (54), 12/17/2025 16:09 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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