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CVE-2019-6991

25
FAUCET Score

CVE-2019-6991 describes a critical stack-based buffer overflow vulnerability in the zmLoadUser() function of the ZoneMinder surveillance software, affecting versions through 1.32.3. An unauthenticated attacker can exploit this flaw by providing an excessively long username, leading to arbitrary code execution. With a CVSS score of 9.8, this vulnerability presents a severe risk due to its network-based attack vector, low complexity, and complete compromise of confidentiality, integrity, and availability. Despite its high severity, there is no public exploit code available (Metasploit, Nuclei, ExploitDB), it is not listed in the KEV catalog, and it has garnered minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.32.3CPE matchmatch criteria
cpe:2.3:a:zoneminder:zoneminder:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.31%
Probability of exploitation in next 30 days
EPSS Percentile
87.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0331 is in the 79th percentile among its peer group of 36,897 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / ZoneMinder/zoneminder/issues/2478
ExploitIssue TrackingThird Party Advisory
github.com / ZoneMinder/zoneminder/pull/2482
PatchThird Party Advisory