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.

Published: 2025-12-16 Last update: 2026-01-13 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-62864 is rated Moderate Risk (45.3/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.06%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-62864

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-26 0.05% 0.06% +0.01%
2 2026-05-14 0.06% 0.05% -0.01%
3 2025-12-22 — 0.06% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-62864

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-62864

Affected software / configurations for CVE-2025-62864

Vendor Product Version Raw CPE
amperecomputing ampereone_a192-32m_firmware < 5.4.5.1 cpe:2.3:o:amperecomputing:ampereone_a192-32m_firmware:*:*:*:*:*:*:*:*
amperecomputing ampereone_a192-26m_firmware < 5.4.5.1 cpe:2.3:o:amperecomputing:ampereone_a192-26m_firmware:*:*:*:*:*:*:*:*
amperecomputing ampereone_a160-28m_firmware < 5.4.5.1 cpe:2.3:o:amperecomputing:ampereone_a160-28m_firmware:*:*:*:*:*:*:*:*
amperecomputing ampereone_a144-33m_firmware < 5.4.5.1 cpe:2.3:o:amperecomputing:ampereone_a144-33m_firmware:*:*:*:*:*:*:*:*
amperecomputing ampereone_a144-26m_firmware < 5.4.5.1 cpe:2.3:o:amperecomputing:ampereone_a144-26m_firmware:*:*:*:*:*:*:*:*
amperecomputing ampereone_a96-36m_firmware < 5.4.5.1 cpe:2.3:o:amperecomputing:ampereone_a96-36m_firmware:*:*:*:*:*:*:*:*
amperecomputing ampereone_a96-36x_firmware < 4.4.5.2 cpe:2.3:o:amperecomputing:ampereone_a96-36x_firmware:*:*:*:*:*:*:*:*
amperecomputing ampereone_a128-34x_firmware < 4.4.5.2 cpe:2.3:o:amperecomputing:ampereone_a128-34x_firmware:*:*:*:*:*:*:*:*
amperecomputing ampereone_a144-24x_firmware < 4.4.5.2 cpe:2.3:o:amperecomputing:ampereone_a144-24x_firmware:*:*:*:*:*:*:*:*
amperecomputing ampereone_a144-27x_firmware < 4.4.5.2 cpe:2.3:o:amperecomputing:ampereone_a144-27x_firmware:*:*:*:*:*:*:*:*
amperecomputing ampereone_a160-28x_firmware < 4.4.5.2 cpe:2.3:o:amperecomputing:ampereone_a160-28x_firmware:*:*:*:*:*:*:*:*
amperecomputing ampereone_a192-26x_firmware < 4.4.5.2 cpe:2.3:o:amperecomputing:ampereone_a192-26x_firmware:*:*:*:*:*:*:*:*
amperecomputing ampereone_a192-26x_firmware < 3.5.9.3 cpe:2.3:o:amperecomputing:ampereone_a192-26x_firmware:*:*:*:*:*:*:*:*
amperecomputing ampereone_a192-32x_firmware < 3.5.9.3 cpe:2.3:o:amperecomputing:ampereone_a192-32x_firmware:*:*:*:*:*:*:*:*

References for CVE-2025-62864

cvelogic Threat Intelligence