Critical severity · published Dec 16, 2025
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…
9.8
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AA
Ampereone A128-34x Firmware · Amperecomputing
before 4.4.5.2 · source: NVD
AA
Ampereone A144-24x Firmware · Amperecomputing
before 4.4.5.2 · source: NVD
AA
Ampereone A144-26m Firmware · Amperecomputing
before 5.4.5.1 · source: NVD
AA
Ampereone A144-27x Firmware · Amperecomputing
before 4.4.5.2 · source: NVD
AA
Ampereone A144-33m Firmware · Amperecomputing
before 5.4.5.1 · source: NVD
AA
Ampereone A160-28m Firmware · Amperecomputing
before 5.4.5.1 · source: NVD
AA
Ampereone A160-28x Firmware · Amperecomputing
before 4.4.5.2 · source: NVD
AA
Ampereone A192-26m Firmware · Amperecomputing
before 5.4.5.1 · source: NVD
AA
Ampereone A192-26x Firmware · Amperecomputing
before 4.4.5.2; before 3.5.9.3 · source: NVD
AA
Ampereone A192-32m Firmware · Amperecomputing
before 5.4.5.1 · source: NVD
AA
Ampereone A192-32x Firmware · Amperecomputing
before 3.5.9.3 · source: NVD
AA
Ampereone A96-36m Firmware · Amperecomputing
before 5.4.5.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-62864
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-62864
Vendor Advisory
https://amperecomputing.com/products/product-security
Vendor Advisory
https://amperecomputing.com/products/security-bulletins/amp-sb-0007
More from Ampereone A128-34x Firmware
9.8
CVE-2025-62863
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 PCIe…
4.6
CVE-2025-62862
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 Boot…