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CVE-2020-27209

24
FAUCET Score

CVE-2020-27209 describes a simple power analysis vulnerability in the micro-ecc library 1.0's ECDSA operation, allowing an attacker to extract the private ECC key. This high-severity vulnerability (CVSS 7.5) has a network attack vector and low attack complexity, with a critical impact on confidentiality. Despite its severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.0CPE matchmatch criteria
cpe:2.3:a:micro-ecc_project:micro-ecc:1.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.54%
Probability of exploitation in next 30 days
EPSS Percentile
72.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0154 is in the 54th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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

eprint.iacr.org / 2021/640
Third Party Advisory
github.com / kmackay/micro-ecc/commit/1b5f5cea5145c96dd8791b9b2c41424fc74c2172
PatchThird Party Advisory
github.com / kmackay/micro-ecc/releases
Third Party Advisory
aisec.fraunhofer.de / de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.html
Third Party Advisory
aisec.fraunhofer.de / en/FirmwareProtection.html
Third Party Advisory