CVE-2021-26630: Improper input validation vulnerability in HANDY Groupware’s ActiveX moudle allows attackers to download or ex

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HIGH 7.8UPGRADE

CVE-2021-26630 is a high-severity flaw (CVSS 7.8) affecting groupware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper input validation vulnerability in HANDY Groupware’s ActiveX moudle allows attackers to download or execute arbitrary files. This vulnerability can be exploited by using the file download or execution path as the parameter value of the vulnerable function.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-20
Published	2022-05-19
Last modified	2026-06-17

Publisher (CNA): KrCERT/CC · Vendor: handysoft

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

Am I affected?

Timeline

2022-05-19 15:15 UTCPublished CVE record published
2026-06-17 03:43 UTCUpdated Record last modified

handysoft groupware UPGRADE

Affected: < 1.7.4.7 · >= 2.0.0.0 and < 2.0.3.7 · >= 4.0.0.0 and < 4.0.1.8

Fixed in: 1.7.4.7, 2.0.3.7, 4.0.1.8

Safe to downgrade to: a release before 2.0.0.0

1. Check installed version

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

2. UPGRADE to 1.7.4.7 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade groupware

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 2.0.0.0 (Debian / Ubuntu)

apt-cache madison groupware sudo apt install groupware=<VERSION_BEFORE_2.0.0.0> sudo apt-mark hold groupware

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

dnf --showduplicates list groupware sudo dnf downgrade groupware-<VERSION_BEFORE_2.0.0.0> sudo dnf versionlock add groupware

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-2021-26630?

groupware: upgrade to 1.7.4.7, 2.0.3.7, 4.0.1.8. Exact commands for each OS are on this page.

Is CVE-2021-26630 being exploited?

CVE-2021-26630 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-2021-26630 affect?

CVE-2021-26630 affects groupware. Severity is high (CVSS 7.8). Improper input validation vulnerability in HANDY Groupware’s ActiveX moudle allows attackers to download or execute arbitrary files. This vulnerability can be exploited by using the file download or execution path as the parameter value of

How urgent is CVE-2021-26630?

Priority 42/100. High severity

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References

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