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CVE-2019-17009

23
FAUCET Score

CVE-2019-17009 describes a local privilege escalation vulnerability affecting Mozilla Firefox, Firefox ESR, and Thunderbird on Windows. The updater service, when running, wrote status and log files to an unrestricted location, which an unprivileged local process could exploit through file handling vulnerabilities. With a CVSS score of 7.8 (High), this vulnerability allows for high impact to confidentiality, integrity, and availability, but requires local system access. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 71.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 68.3CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
< 68.3CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
15.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.33%
Probability of exploitation in next 30 days
EPSS Percentile
25.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0033 is in the 64th percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 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

Vendor Patches (1)

mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2019-17009Moderate

Mozilla: Updater temporary files accessible to unprivileged processes

Dec 3, 2019

References

lists.opensuse.org / opensuse-security-announce/2020-01/msg00000.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2020-01/msg00001.html
Mailing ListThird Party Advisory
bugzilla.mozilla.org / show_bug.cgi
Permissions Required
mozilla.org / security/advisories/mfsa2019-36
Vendor Advisory
mozilla.org / security/advisories/mfsa2019-37
Vendor Advisory
mozilla.org / security/advisories/mfsa2019-38
Vendor Advisory