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CVE-2020-11684

22
FAUCET Score

CVE-2020-11684 is a critical vulnerability affecting AT91bootstrap versions prior to 3.9.2, where encryption and authentication keys are not properly cleared from memory before transferring control to less privileged software components. This allows an unauthenticated attacker to remotely disclose these keys with low attack complexity, leading to potential compromise of subsequent boot stages. While the CVSS score is 9.1 (Critical), there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.7.2, < 3.9.2CPE matchmatch criteria
cpe:2.3:a:linux4sam:at91bootstrap:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.08%
Probability of exploitation in next 30 days
EPSS Percentile
61.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-23
Model: v2026.06.15
This CVE's current EPSS score of 0.0108 is in the 47th percentile among its peer group of 36,829 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / linux4sam/at91bootstrap/commit/45419497309ffbf27c17ea7938499aca99168927
PatchThird Party Advisory
labs.f-secure.com / advisories/microchip-at91bootstrap
ExploitThird Party Advisory