CRITICAL

CVE-2019-6991

CVSS v3

9.8

CRITICAL

EPSS Score

3.3 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2019-6991 yet.

Full record on NVD

Description

A classic Stack-based buffer overflow exists in the zmLoadUser() function in zm_user.cpp of the zmu binary in ZoneMinder through 1.32.3, allowing an unauthenticated attacker to execute code via a long username.

Technical details

Published: 2019-01-28

Frequently asked questions

What is CVE-2019-6991?

Is CVE-2019-6991 actively exploited?

Active exploitation of CVE-2019-6991 has not been confirmed. Its EPSS score was 3.3% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-6991?

CVE-2019-6991 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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