HOMEVULNERABILITIESCVE-2020-6815
CRITICAL

CVE-2020-6815

CWE-787Published: March 25, 2020· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

Mozilla developers reported memory safety and script safety bugs present in Firefox 73. Some of these bugs showed evidence of memory corruption or escalation of privilege and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 74.

NVD Source

Technical Analysis

CVE-2020-6815 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Mozilla1 product(s)
firefox
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

ADVISORYhttps://bugzilla.mozilla.org/buglist.cgi?bug_id=1181957%2C1557732%2C1557739%2C1611457%2C1612431
ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2020-08/
ADVISORYhttps://bugzilla.mozilla.org/buglist.cgi?bug_id=1181957%2C1557732%2C1557739%2C1611457%2C1612431
ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2020-08/

All References (4)

→
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1181957%2C1557732%2C1557739%2C1611457%2C1612431Permissions Required · Vendor Advisory
→
https://www.mozilla.org/security/advisories/mfsa2020-08/Vendor Advisory
→
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1181957%2C1557732%2C1557739%2C1611457%2C1612431Permissions Required · Vendor Advisory
→
https://www.mozilla.org/security/advisories/mfsa2020-08/Vendor Advisory

Quick Facts

CVE IDCVE-2020-6815
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-787
CISA KEVNo
Affected1 vendor(s)
PublishedMar 25, 2020

Related CVEs (CWE-787)

CVE-2020-11897
10.0
CVE-2015-0235
10.0
CVE-2018-2913
10.0
CVE-2019-6235
10.0
CVE-2022-30292
10.0
CVE-2004-0574
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-6815 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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