How severe is CVE-2020-8806?

CVE-2020-8806 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 none, integrity high, and availability none.

Is CVE-2020-8806 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8806?

CVE-2020-8806 affects Electriccoin Zcashd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-8806?

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-2020-8806 published?

CVE-2020-8806 was published on 2021-02-05 and last updated on 2026-06-17.

CVE-2020-8806

CVE-2020-8806 is a high-severity vulnerability in Electriccoin Zcashd 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. The underlying weakness is classified as CWE-863.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-863
Affected product: Electriccoin Zcashd
Published: 2021-02-05
Last modified: 2026-06-17

Description

Electric Coin Company Zcashd before 2.1.1-1 allows attackers to trigger consensus failure and double spending. A valid chain could be incorrectly rejected because timestamp requirements on block headers were not properly enforced.

Frequently asked questions

What is CVE-2020-8806?: Electric Coin Company Zcashd before 2.1.1-1 allows attackers to trigger consensus failure and double spending. A valid chain could be incorrectly rejected because timestamp requirements on block headers were not properly enforced.
How severe is CVE-2020-8806?: CVE-2020-8806 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 none, integrity high, and availability none.
Is CVE-2020-8806 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8806?: CVE-2020-8806 affects Electriccoin Zcashd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-8806?: 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-2020-8806 published?: CVE-2020-8806 was published on 2021-02-05 and last updated on 2026-06-17.

References

https://electriccoin.co/blog/new-releases-2-1-1-and-hotfix-2-1-1-1/

Affected products (1)

cpe:2.3:a:electriccoin:zcashd:*:*:*:*:*:*:*:*

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