How severe is CVE-2020-11684?

CVE-2020-11684 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2020-11684 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-11684?

CVE-2020-11684 affects Linux4sam At91bootstrap. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-11684?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-11684 published?

CVE-2020-11684 was published on 2020-09-14 and last updated on 2026-06-17.

CVE-2020-11684

CVE-2020-11684 is a critical-severity vulnerability in Linux4sam At91bootstrap with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-212.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-212
Affected product: Linux4sam At91bootstrap
Published: 2020-09-14
Last modified: 2026-06-17

Description

AT91bootstrap before 3.9.2 does not properly wipe encryption and authentication keys from memory before passing control to a less privileged software component. This can be exploited to disclose these keys and subsequently encrypt and sign the next boot stage (such as the bootloader).

Frequently asked questions

What is CVE-2020-11684?: AT91bootstrap before 3.9.2 does not properly wipe encryption and authentication keys from memory before passing control to a less privileged software component. This can be exploited to disclose these keys and subsequently encrypt and sign the next boot stage (such as the bootloader).
How severe is CVE-2020-11684?: CVE-2020-11684 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2020-11684 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-11684?: CVE-2020-11684 affects Linux4sam At91bootstrap. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-11684?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-11684 published?: CVE-2020-11684 was published on 2020-09-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:linux4sam:at91bootstrap:*:*:*:*:*:*:*:*

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