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CVE-2019-11734

29
FAUCET Score

CVE-2019-11734 is a critical memory safety vulnerability affecting Mozilla Firefox versions prior to 69. This flaw, stemming from memory corruption bugs, could potentially allow an unauthenticated attacker to execute arbitrary code with high impact on confidentiality, integrity, and availability. While no public exploit code or active exploitation has been confirmed, its high CVSS score of 9.8 and mention in security media highlight its severe potential. Community discussion and media coverage indicate moderate attention to this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 69CPE match
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 69.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
1.29%
Probability of exploitation in next 30 days
EPSS Percentile
67.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0129 is in the 54th percentile among its peer group of 36,897 CVEs.

Social Chatter

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

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

Remediation

Vendor Patches (1)

mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2019-11734Important

Mozilla: Memory safety bugs fixed in Firefox 69

Sep 3, 2019

References

bugzilla.mozilla.org / buglist.cgi
Issue TrackingNot ApplicableVendor Advisory
mozilla.org / security/advisories/mfsa2019-25
Vendor Advisory