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Vulnerability details: VCID-8cv4-kvfj-4uek
Vulnerability ID VCID-8cv4-kvfj-4uek
Aliases CVE-2019-11758
Summary Mozilla community member Philipp reported a memory safety bug present in Firefox 68 when 360 Total Security was installed. This bug showed evidence of memory corruption in the accessibility engine and we presume that with enough effort that it could be exploited to run arbitrary code.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-122 Heap-based Buffer Overflow
System Score Found at
cvssv3 8.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-11758.json
epss 0.00849 https://api.first.org/data/v1/epss?cve=CVE-2019-11758
epss 0.00849 https://api.first.org/data/v1/epss?cve=CVE-2019-11758
epss 0.00849 https://api.first.org/data/v1/epss?cve=CVE-2019-11758
epss 0.00849 https://api.first.org/data/v1/epss?cve=CVE-2019-11758
epss 0.00849 https://api.first.org/data/v1/epss?cve=CVE-2019-11758
epss 0.00849 https://api.first.org/data/v1/epss?cve=CVE-2019-11758
epss 0.00849 https://api.first.org/data/v1/epss?cve=CVE-2019-11758
epss 0.00849 https://api.first.org/data/v1/epss?cve=CVE-2019-11758
epss 0.00849 https://api.first.org/data/v1/epss?cve=CVE-2019-11758
epss 0.00849 https://api.first.org/data/v1/epss?cve=CVE-2019-11758
epss 0.00849 https://api.first.org/data/v1/epss?cve=CVE-2019-11758
epss 0.00849 https://api.first.org/data/v1/epss?cve=CVE-2019-11758
epss 0.00849 https://api.first.org/data/v1/epss?cve=CVE-2019-11758
epss 0.00849 https://api.first.org/data/v1/epss?cve=CVE-2019-11758
epss 0.00849 https://api.first.org/data/v1/epss?cve=CVE-2019-11758
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-25
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-33
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-35
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-11758.json
https://api.first.org/data/v1/epss?cve=CVE-2019-11758
1764439 https://bugzilla.redhat.com/show_bug.cgi?id=1764439
mfsa2019-25 https://www.mozilla.org/en-US/security/advisories/mfsa2019-25
mfsa2019-33 https://www.mozilla.org/en-US/security/advisories/mfsa2019-33
mfsa2019-35 https://www.mozilla.org/en-US/security/advisories/mfsa2019-35
RHSA-2019:3193 https://access.redhat.com/errata/RHSA-2019:3193
RHSA-2019:3196 https://access.redhat.com/errata/RHSA-2019:3196
RHSA-2019:3210 https://access.redhat.com/errata/RHSA-2019:3210
RHSA-2019:3237 https://access.redhat.com/errata/RHSA-2019:3237
RHSA-2019:3281 https://access.redhat.com/errata/RHSA-2019:3281
RHSA-2019:3756 https://access.redhat.com/errata/RHSA-2019:3756
USN-4202-1 https://usn.ubuntu.com/4202-1/
USN-4335-1 https://usn.ubuntu.com/4335-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-11758.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.74817
EPSS Score 0.00849
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:17:18.648694+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2019/mfsa2019-33.yml 38.0.0