CVE-2019-7167: Zcash, before the Sapling network upgrade (2018-10-28), had a counterfeiting vulnerability

Q: How do I fix CVE-2019-7167?

zcash: upgrade to newer than 2.0.1. Exact commands for each OS are on this page.

Q: Is CVE-2019-7167 being exploited?

CVE-2019-7167 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-7167 affect?

CVE-2019-7167 affects zcash. Severity is high (CVSS 7.5). Zcash, before the Sapling network upgrade (2018-10-28), had a counterfeiting vulnerability. A key-generation process, during evaluation of polynomials related to a to-be-proven statement, produced certain bypass elements. Availability of th

Q: How urgent is CVE-2019-7167?

Priority 52/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2019-7167 is a high-severity flaw (CVSS 7.5) affecting zcash. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Zcash, before the Sapling network upgrade (2018-10-28), had a counterfeiting vulnerability. A key-generation process, during evaluation of polynomials related to a to-be-proven statement, produced certain bypass elements. Availability of these elements allowed a cheating prover to bypass a consistency check, and consequently transform the proof of one statement into an ostensibly valid proof of a different statement, thereby breaking the soundnes

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.2% (top 18%)
CISA exploited list	No
Weakness	CWE-754
Published	2019-03-27
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: z.cash

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-03-27 02:29 UTCPublished CVE record published
2026-06-17 02:40 UTCUpdated Record last modified

z.cash zcash UPGRADE

Affected: <= 2.0.1

Fixed in: newer than 2.0.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy zcash || rpm -q zcash || zcash --version

2. UPGRADE to newer than 2.0.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade zcash

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zcash

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-7167?

zcash: upgrade to newer than 2.0.1. Exact commands for each OS are on this page.

Is CVE-2019-7167 being exploited?

CVE-2019-7167 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-7167 affect?

CVE-2019-7167 affects zcash. Severity is high (CVSS 7.5). Zcash, before the Sapling network upgrade (2018-10-28), had a counterfeiting vulnerability. A key-generation process, during evaluation of polynomials related to a to-be-proven statement, produced certain bypass elements. Availability of th

How urgent is CVE-2019-7167?

Priority 52/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2019-16930 MEDIUM 5.3 UPGRADE Zcashd in Zcash before 2.0.7-3 allows discovery of the IP address of a full node that owns a shielded address,
CVE-2019-11636 HIGH 7.5 UPGRADE Zcash 2.x allows an inexpensive approach to "fill all transactions of all blocks" and "prevent any real transa

References

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