CVE-2021-39196: pcapture is an open source dumpcap web service interface

Q: How do I fix CVE-2021-39196?

pcapture: upgrade to 3.12. Exact commands for each OS are on this page.

Q: Is CVE-2021-39196 being exploited?

CVE-2021-39196 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-39196 affect?

CVE-2021-39196 affects pcapture. Severity is high (CVSS 7.7). pcapture is an open source dumpcap web service interface . In affected versions this vulnerability allows an authenticated but unprivileged user to use the REST API to capture and download packets with no capture filter and without adequate

This month

HIGH 7.7UPGRADE

CVE-2021-39196 is a high-severity flaw (CVSS 7.7) affecting pcapture. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

pcapture is an open source dumpcap web service interface . In affected versions this vulnerability allows an authenticated but unprivileged user to use the REST API to capture and download packets with no capture filter and without adequate permissions. This is important because the capture filters can effectively limit the scope of information that a user can see in the data captures. If no filter is present, then all data on the local network s

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.7 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.3% (top 31%)
CISA exploited list	No
Weakness	CWE-287, CWE-754
Published	2021-09-07
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: pcapture 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 19:15 UTCPublished CVE record published
2026-06-17 04:03 UTCUpdated Record last modified

pcapture project pcapture UPGRADE

Affected: < 3.12

Fixed in: 3.12

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 3.12 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pcapture

Note

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

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-2021-39196?

pcapture: upgrade to 3.12. Exact commands for each OS are on this page.

Is CVE-2021-39196 being exploited?

CVE-2021-39196 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-2021-39196 affect?

CVE-2021-39196 affects pcapture. Severity is high (CVSS 7.7). pcapture is an open source dumpcap web service interface . In affected versions this vulnerability allows an authenticated but unprivileged user to use the REST API to capture and download packets with no capture filter and without adequate

How urgent is CVE-2021-39196?

Priority 44/100. High severity

References

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