How severe is CVE-2020-27209?

CVE-2020-27209 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-27209 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-27209?

CVE-2020-27209 affects Micro-ecc Project Micro-ecc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-27209?

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

When was CVE-2020-27209 published?

CVE-2020-27209 was published on 2021-05-20 and last updated on 2026-06-17.

CVE-2020-27209

CVE-2020-27209 is a high-severity vulnerability in Micro-ecc Project Micro-ecc with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Micro-ecc Project Micro-ecc
Published: 2021-05-20
Last modified: 2026-06-17

Description

The ECDSA operation of the micro-ecc library 1.0 is vulnerable to simple power analysis attacks which allows an adversary to extract the private ECC key.

Frequently asked questions

What is CVE-2020-27209?: The ECDSA operation of the micro-ecc library 1.0 is vulnerable to simple power analysis attacks which allows an adversary to extract the private ECC key.
How severe is CVE-2020-27209?: CVE-2020-27209 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-27209 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-27209?: CVE-2020-27209 affects Micro-ecc Project Micro-ecc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-27209?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-27209 published?: CVE-2020-27209 was published on 2021-05-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:micro-ecc_project:micro-ecc:1.0:*:*:*:*:*:*:*