CVE-2021-20790: Improper control of program execution vulnerability in RevoWorks Browser 2.1.230 and earlier allows an attacke

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CRITICAL 9.6UPGRADE

CVE-2021-20790 is a critical-severity flaw (CVSS 9.6) affecting revoworks browser. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper control of program execution vulnerability in RevoWorks Browser 2.1.230 and earlier allows an attacker to execute an arbitrary command or code via unspecified vectors.

Why this priority

Critical severity

A fixed release or distro patch exists.

Risk facts

CVSS score	9.6 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Published	2021-09-17
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: jscom

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

Am I affected?

Timeline

2021-09-17 02:15 UTCPublished CVE record published
2026-06-17 03:34 UTCUpdated Record last modified

jscom revoworks browser UPGRADE

Affected: >= 2.1.197 and <= 2.1.230

Fixed in: newer than 2.1.230

Safe to downgrade to: a release before 2.1.197

1. Check installed version

apt-cache policy revoworks-browser || rpm -q revoworks-browser || revoworks-browser --version

2. UPGRADE to newer than 2.1.230 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade revoworks-browser

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade revoworks-browser

Note

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

3. If no update is available yet, DOWNGRADE to a release before 2.1.197 (Debian / Ubuntu)

apt-cache madison revoworks-browser sudo apt install revoworks-browser=<VERSION_BEFORE_2.1.197> sudo apt-mark hold revoworks-browser

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list revoworks-browser sudo dnf downgrade revoworks-browser-<VERSION_BEFORE_2.1.197> sudo dnf versionlock add revoworks-browser

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-2021-20790?

revoworks browser: upgrade to newer than 2.1.230. Exact commands for each OS are on this page.

Is CVE-2021-20790 being exploited?

CVE-2021-20790 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-2021-20790 affect?

CVE-2021-20790 affects revoworks browser. Severity is critical (CVSS 9.6). Improper control of program execution vulnerability in RevoWorks Browser 2.1.230 and earlier allows an attacker to execute an arbitrary command or code via unspecified vectors.

How urgent is CVE-2021-20790?

Priority 51/100. Critical severity

Related CVEs

CVE-2022-27176 HIGH 7.8 UPGRADE UPGRADE Incomplete filtering of special elements vulnerability exists in RevoWorks SCVX using 'File Sanitization Libra
CVE-2021-20791 CRITICAL 9.3 UPGRADE Improper access control vulnerability in RevoWorks Browser 2.1.230 and earlier allows an attacker to bypass ac

References

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