CVE-2021-47790: Active WebCam 11.5 contains an unquoted service path vulnerability that allows local attackers to execute arbi

Routine

HIGH 7.8DOWNGRADE

CVE-2021-47790 is a high-severity flaw (CVSS 7.8) affecting active webcam. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Active WebCam 11.5 contains an unquoted service path vulnerability that allows local attackers to execute arbitrary code with elevated system privileges. Attackers can exploit the misconfigured service path by placing malicious executables in specific directory locations to gain administrative access.

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	Low
User interaction	None
EPSS exploit chance	0.2% (top 86%)
CISA exploited list	No
Weakness	CWE-428
Published	2026-01-16
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: pysoft

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

Am I affected?

Timeline

2026-01-16 00:16 UTCPublished CVE record published
2026-06-17 04:18 UTCUpdated Record last modified

pysoft active webcam DOWNGRADE

Affected: 11.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 11.5

1. Check installed version

apt-cache policy active-webcam || rpm -q active-webcam || active-webcam --version

2. No fixed release: DOWNGRADE to a release before 11.5 (Debian / Ubuntu)

apt-cache madison active-webcam sudo apt install active-webcam=<VERSION_BEFORE_11.5> sudo apt-mark hold active-webcam

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

dnf --showduplicates list active-webcam sudo dnf downgrade active-webcam-<VERSION_BEFORE_11.5> sudo dnf versionlock add active-webcam

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-2021-47790?

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

Is CVE-2021-47790 being exploited?

CVE-2021-47790 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-2021-47790 affect?

CVE-2021-47790 affects active webcam. Severity is high (CVSS 7.8). Active WebCam 11.5 contains an unquoted service path vulnerability that allows local attackers to execute arbitrary code with elevated system privileges. Attackers can exploit the misconfigured service path by placing malicious executables

How urgent is CVE-2021-47790?

Priority 36/100. High severity; Public exploit reference

References

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