CVE-2021-45454

Ampere Altra before SRP 1.08b and Altra Max​ before SRP 2.05 allow information disclosure of power telemetry via HWmon.

Published: 2022-08-17 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-45454 is rated Moderate Risk (49.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.35%). 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-2021-45454

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 2025-08-19 0.35% 0.35% -0.00%
2 2025-08-18 0.17% 0.35% +0.18%
3 2025-03-30 — 0.17% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-45454

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N 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:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2021-45454

Affected software / configurations for CVE-2021-45454

Vendor Product Version Raw CPE
amperecomputing ampere_altra_firmware < 1.08b cpe:2.3:o:amperecomputing:ampere_altra_firmware:*:*:*:*:*:*:*:*
amperecomputing ampere_altra_max_firmware < 2.05 cpe:2.3:o:amperecomputing:ampere_altra_max_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-45454

cvelogic Threat Intelligence