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CVE-2017-7804

21
FAUCET Score

CVE-2017-7804 is a high-severity vulnerability affecting Mozilla Firefox, Firefox ESR, and Thunderbird on Windows operating systems, allowing malicious code to write arbitrary data to memory by re-purposing a destructor function. This flaw, with a CVSS score of 7.5, can bypass memory protections and lead to high integrity impact without requiring user interaction. While no public exploits, Metasploit modules, or Nuclei templates are available, and there is minimal community discussion, the vulnerability's nature suggests a potential for significant impact if exploited. It is not currently listed on the KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
< 52.3.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 55.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
< 52.3.0CPE matchmatch criteria
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.51%
Probability of exploitation in next 30 days
EPSS Percentile
71.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0151 is in the 53rd percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

mozillavendor investigatingvia nvd_reference
View patch

References

bugzilla.mozilla.org / show_bug.cgi
Issue TrackingThird Party Advisory
mozilla.org / security/advisories/mfsa2017-18
Vendor Advisory
mozilla.org / security/advisories/mfsa2017-19
Vendor Advisory
mozilla.org / security/advisories/mfsa2017-20
Vendor Advisory
securityfocus.com / bid/100234
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039124
Third Party AdvisoryVDB Entry