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Vulnerability details: VCID-fmzt-2b3a-27af
Vulnerability ID VCID-fmzt-2b3a-27af
Aliases CVE-2019-11735
Summary Mozilla developers and community members Mikhail Gavrilov, Tyson Smith, Marcia Knous, Tom Ritter, Philipp, and Bob Owens reported memory safety bugs present in Firefox 68 and Firefox ESR 68. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these 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 (2)
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-787 Out-of-bounds Write
System Score Found at
cvssv3 9.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-11735.json
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
epss 0.00458 https://api.first.org/data/v1/epss?cve=CVE-2019-11735
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2019-11735
cvssv3.1 8.8 https://nvd.nist.gov/vuln/detail/CVE-2019-11735
archlinux High https://security.archlinux.org/AVG-1036
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-25
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-26
Reference id Reference type URL
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00017.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-11735.json
https://api.first.org/data/v1/epss?cve=CVE-2019-11735
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1561404%2C1561484%2C1568047%2C1561912%2C1565744%2C1568858%2C1570358
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11735
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://www.mozilla.org/security/advisories/mfsa2019-25/
https://www.mozilla.org/security/advisories/mfsa2019-26/
1748661 https://bugzilla.redhat.com/show_bug.cgi?id=1748661
ASA-201909-2 https://security.archlinux.org/ASA-201909-2
AVG-1036 https://security.archlinux.org/AVG-1036
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
CVE-2019-11735 https://nvd.nist.gov/vuln/detail/CVE-2019-11735
mfsa2019-25 https://www.mozilla.org/en-US/security/advisories/mfsa2019-25
mfsa2019-26 https://www.mozilla.org/en-US/security/advisories/mfsa2019-26
RHSA-2019:2663 https://access.redhat.com/errata/RHSA-2019:2663
USN-4122-1 https://usn.ubuntu.com/4122-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-11735.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
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
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
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2019-11735
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2019-11735
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 0.63047
EPSS Score 0.00458
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:59.497038+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2019/mfsa2019-26.yml 37.0.0