CVE-2020-19766: The time check operation of PepeAuctionSale 1.0 can be rendered ineffective by assigning a large number to the

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2020-19766 is a high-severity flaw (CVSS 7.5) affecting tokenerc20. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The time check operation of PepeAuctionSale 1.0 can be rendered ineffective by assigning a large number to the _duration variable, compromising access control to the application.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.9% (top 39%)
CISA exploited list	No
Weakness	CWE-754
Published	2021-09-07
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: tokenerc20 project

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

Am I affected?

Timeline

2021-09-07 22:15 UTCPublished CVE record published
2026-06-17 02:59 UTCUpdated Record last modified

tokenerc20 project tokenerc20 DOWNGRADE

Affected: 1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0

1. Check installed version

apt-cache policy tokenerc20 || rpm -q tokenerc20 || tokenerc20 --version

2. No fixed release: DOWNGRADE to a release before 1.0 (Debian / Ubuntu)

apt-cache madison tokenerc20 sudo apt install tokenerc20=<VERSION_BEFORE_1.0> sudo apt-mark hold tokenerc20

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list tokenerc20 sudo dnf downgrade tokenerc20-<VERSION_BEFORE_1.0> sudo dnf versionlock add tokenerc20

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2020-19766?

tokenerc20: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-19766 being exploited?

CVE-2020-19766 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-2020-19766 affect?

CVE-2020-19766 affects tokenerc20. Severity is high (CVSS 7.5). The time check operation of PepeAuctionSale 1.0 can be rendered ineffective by assigning a large number to the _duration variable, compromising access control to the application.

How urgent is CVE-2020-19766?

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

References

← Back to latest CVEs