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CVE-2020-8806

22
FAUCET Score

CVE-2020-8806 describes a critical vulnerability in Electric Coin Company's Zcashd software, specifically versions prior to 2.1.1-1. This flaw allows attackers to cause consensus failures and potentially facilitate double spending by exploiting improperly enforced timestamp requirements on block headers, leading to the rejection of valid blockchain data. With a CVSS score of 7.5 (High), this vulnerability has a low attack complexity and requires no user interaction, enabling remote attackers to impact the integrity of the Zcash network. While the potential impact is high, there is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.1.1CPE matchmatch criteria
cpe:2.3:a:electriccoin:zcashd:*:*:*:*:*:*:*:*

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:N/I:H/A:N

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

Exploit Intelligence

EPSS Score
1.03%
Probability of exploitation in next 30 days
EPSS Percentile
60.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0103 is in the 37th 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

Remediation records are not available for this CVE.

References

electriccoin.co / blog/new-releases-2-1-1-and-hotfix-2-1-1-1
Release NotesVendor Advisory