CVE-2020-12788

CMAC verification functionality in Microchip Atmel ATSAMA5 products is vulnerable to vulnerable to timing and power analysis attacks.

Published: 2020-09-14 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-12788 is rated Moderate Risk (47.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.32%). 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-2020-12788

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 2025-03-30 0.61% 0.32% -0.30%
2 2025-03-29 0.32% 0.61% +0.30%
3 2025-03-17 — 0.32% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-12788

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]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2020-12788

Affected software / configurations for CVE-2020-12788

Vendor Product Version Raw CPE
microchip atsama5d21c-cu_firmware — cpe:2.3:o:microchip:atsama5d21c-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d21c-cur_firmware — cpe:2.3:o:microchip:atsama5d21c-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d22c-cn_firmware — cpe:2.3:o:microchip:atsama5d22c-cn_firmware:-:*:*:*:*:*:*:*
microchip atsama5d22c-cnr_firmware — cpe:2.3:o:microchip:atsama5d22c-cnr_firmware:-:*:*:*:*:*:*:*
microchip atsama5d22c-cu_firmware — cpe:2.3:o:microchip:atsama5d22c-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d22c-cur_firmware — cpe:2.3:o:microchip:atsama5d22c-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d23c-cn_firmware — cpe:2.3:o:microchip:atsama5d23c-cn_firmware:-:*:*:*:*:*:*:*
microchip atsama5d23c-cnr_firmware — cpe:2.3:o:microchip:atsama5d23c-cnr_firmware:-:*:*:*:*:*:*:*
microchip atsama5d23c-cu_firmware — cpe:2.3:o:microchip:atsama5d23c-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d23c-cur_firmware — cpe:2.3:o:microchip:atsama5d23c-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d24c-cu_firmware — cpe:2.3:o:microchip:atsama5d24c-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d24c-cuf_firmware — cpe:2.3:o:microchip:atsama5d24c-cuf_firmware:-:*:*:*:*:*:*:*
microchip atsama5d24c-cur_firmware — cpe:2.3:o:microchip:atsama5d24c-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d26c-cn_firmware — cpe:2.3:o:microchip:atsama5d26c-cn_firmware:-:*:*:*:*:*:*:*
microchip atsama5d26c-cnr_firmware — cpe:2.3:o:microchip:atsama5d26c-cnr_firmware:-:*:*:*:*:*:*:*
microchip atsama5d26c-cu_firmware — cpe:2.3:o:microchip:atsama5d26c-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d26c-cur_firmware — cpe:2.3:o:microchip:atsama5d26c-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d27c-cn_firmware — cpe:2.3:o:microchip:atsama5d27c-cn_firmware:-:*:*:*:*:*:*:*
microchip atsama5d27c-cnr_firmware — cpe:2.3:o:microchip:atsama5d27c-cnr_firmware:-:*:*:*:*:*:*:*
microchip atsama5d27c-cu_firmware — cpe:2.3:o:microchip:atsama5d27c-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d27c-cur_firmware — cpe:2.3:o:microchip:atsama5d27c-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d28c-cn_firmware — cpe:2.3:o:microchip:atsama5d28c-cn_firmware:-:*:*:*:*:*:*:*
microchip atsama5d28c-cnr_firmware — cpe:2.3:o:microchip:atsama5d28c-cnr_firmware:-:*:*:*:*:*:*:*
microchip atsama5d28c-cu_firmware — cpe:2.3:o:microchip:atsama5d28c-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d28c-cur_firmware — cpe:2.3:o:microchip:atsama5d28c-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d27c-cnvao_firmware — cpe:2.3:o:microchip:atsama5d27c-cnvao_firmware:-:*:*:*:*:*:*:*
microchip atsama5d27c-cnrvao_firmware — cpe:2.3:o:microchip:atsama5d27c-cnrvao_firmware:-:*:*:*:*:*:*:*
microchip atsama5d225c-d1m-cur_firmware — cpe:2.3:o:microchip:atsama5d225c-d1m-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d27c-d5m-cu_firmware — cpe:2.3:o:microchip:atsama5d27c-d5m-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d27c-d5m-cur_firmware — cpe:2.3:o:microchip:atsama5d27c-d5m-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d27c-d1g-cu_firmware — cpe:2.3:o:microchip:atsama5d27c-d1g-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d27c-d1g-cur_firmware — cpe:2.3:o:microchip:atsama5d27c-d1g-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d28c-d1g-cu_firmware — cpe:2.3:o:microchip:atsama5d28c-d1g-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d28c-d1g-cur_firmware — cpe:2.3:o:microchip:atsama5d28c-d1g-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d27c-ld1g-cu_firmware — cpe:2.3:o:microchip:atsama5d27c-ld1g-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d27c-ld1g-cur_firmware — cpe:2.3:o:microchip:atsama5d27c-ld1g-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d27c-ld2g-cu_firmware — cpe:2.3:o:microchip:atsama5d27c-ld2g-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d27c-ld2g-cur_firmware — cpe:2.3:o:microchip:atsama5d27c-ld2g-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d28c-ld1g-cu_firmware — cpe:2.3:o:microchip:atsama5d28c-ld1g-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d28c-ld1g-cur_firmware — cpe:2.3:o:microchip:atsama5d28c-ld1g-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d28c-ld2g-cu_firmware — cpe:2.3:o:microchip:atsama5d28c-ld2g-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d28c-ld2g-cur_firmware — cpe:2.3:o:microchip:atsama5d28c-ld2g-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d27-wlsom1_firmware — cpe:2.3:o:microchip:atsama5d27-wlsom1_firmware:-:*:*:*:*:*:*:*
microchip atsama5d27-som1_firmware — cpe:2.3:o:microchip:atsama5d27-som1_firmware:-:*:*:*:*:*:*:*
microchip atsama5d31a-cu_firmware — cpe:2.3:o:microchip:atsama5d31a-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d31a-cur_firmware — cpe:2.3:o:microchip:atsama5d31a-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d31a-cfu_firmware — cpe:2.3:o:microchip:atsama5d31a-cfu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d31a-cfur_firmware — cpe:2.3:o:microchip:atsama5d31a-cfur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d33a-cu_firmware — cpe:2.3:o:microchip:atsama5d33a-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d33a-cur_firmware — cpe:2.3:o:microchip:atsama5d33a-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d34a-cu_firmware — cpe:2.3:o:microchip:atsama5d34a-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d34a-cur_firmware — cpe:2.3:o:microchip:atsama5d34a-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d35a-cu_firmware — cpe:2.3:o:microchip:atsama5d35a-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d35a-cur_firmware — cpe:2.3:o:microchip:atsama5d35a-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d35a-cn_firmware — cpe:2.3:o:microchip:atsama5d35a-cn_firmware:-:*:*:*:*:*:*:*
microchip atsama5d35a-cnr_firmware — cpe:2.3:o:microchip:atsama5d35a-cnr_firmware:-:*:*:*:*:*:*:*
microchip atsama5d36a-cu_firmware — cpe:2.3:o:microchip:atsama5d36a-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d36a-cur_firmware — cpe:2.3:o:microchip:atsama5d36a-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d36a-cn_firmware — cpe:2.3:o:microchip:atsama5d36a-cn_firmware:-:*:*:*:*:*:*:*
microchip atsama5d36a-cnr_firmware — cpe:2.3:o:microchip:atsama5d36a-cnr_firmware:-:*:*:*:*:*:*:*
microchip atsama5d41a-cu_firmware — cpe:2.3:o:microchip:atsama5d41a-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d41a-cur_firmware — cpe:2.3:o:microchip:atsama5d41a-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d41b-cu_firmware — cpe:2.3:o:microchip:atsama5d41b-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d41b-cur_firmware — cpe:2.3:o:microchip:atsama5d41b-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d42a-cu_firmware — cpe:2.3:o:microchip:atsama5d42a-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d42a-cur_firmware — cpe:2.3:o:microchip:atsama5d42a-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d42b-cu_firmware — cpe:2.3:o:microchip:atsama5d42b-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d42b-cur_firmware — cpe:2.3:o:microchip:atsama5d42b-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d43a-cu_firmware — cpe:2.3:o:microchip:atsama5d43a-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d43a-cur_firmware — cpe:2.3:o:microchip:atsama5d43a-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d43b-cu_firmware — cpe:2.3:o:microchip:atsama5d43b-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d43b-cur_firmware — cpe:2.3:o:microchip:atsama5d43b-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d44a-cu_firmware — cpe:2.3:o:microchip:atsama5d44a-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d44a-cur_firmware — cpe:2.3:o:microchip:atsama5d44a-cur_firmware:-:*:*:*:*:*:*:*
microchip atsama5d44b-cu_firmware — cpe:2.3:o:microchip:atsama5d44b-cu_firmware:-:*:*:*:*:*:*:*
microchip atsama5d44b-cur_firmware — cpe:2.3:o:microchip:atsama5d44b-cur_firmware:-:*:*:*:*:*:*:*

References for CVE-2020-12788

cvelogic Threat Intelligence