CVE-2020-18173: A DLL injection vulnerability in 1password.dll of 1Password 7.3.712 allows attackers to execute arbitrary code

This month

HIGH 7.8DOWNGRADE

CVE-2020-18173 is a high-severity flaw (CVSS 7.8) affecting 1password. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A DLL injection vulnerability in 1password.dll of 1Password 7.3.712 allows attackers to execute arbitrary code.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-427
Published	2021-07-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: 1password

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

Am I affected?

Timeline

2021-07-26 20:15 UTCPublished CVE record published
2026-06-17 02:59 UTCUpdated Record last modified

1password 1password DOWNGRADE

Affected: 7.3.712

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.3.712

1. Check installed version

apt-cache policy 1password || rpm -q 1password || 1password --version

2. No fixed release: DOWNGRADE to a release before 7.3.712 (Debian / Ubuntu)

apt-cache madison 1password sudo apt install 1password=<VERSION_BEFORE_7.3.712> sudo apt-mark hold 1password

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

dnf --showduplicates list 1password sudo dnf downgrade 1password-<VERSION_BEFORE_7.3.712> sudo dnf versionlock add 1password

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-2020-18173?

1password: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-18173 being exploited?

CVE-2020-18173 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-2020-18173 affect?

CVE-2020-18173 affects 1password. Severity is high (CVSS 7.8). A DLL injection vulnerability in 1password.dll of 1Password 7.3.712 allows attackers to execute arbitrary code.

How urgent is CVE-2020-18173?

Priority 43/100. High severity; Public exploit reference

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References

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