CVE-2007-3670

mediumpriority · track · 37EPSS 0.294 · 98 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

29.4% (98th) EPSS

CVSS 4.3 · medium

Is it mine?

4 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

Argument injection vulnerability in Microsoft Internet Explorer, when running on systems with Firefox installed and certain URIs registered, allows remote attackers to conduct cross-browser scripting attacks and execute arbitrary commands via shell metacharacters in a (1) FirefoxURL or (2) FirefoxHTML URI, which are inserted into the command line that is created when invoking firefox.exe. NOTE: it has been debated as to whether the issue is in Internet Explorer or Firefox. As of 20070711, it is CVE's opinion that IE appears to be failing to properly delimit the URL argument when invoking Firefox, and this issue could arise with other protocol handlers in IE as well. However, Mozilla has stated that it will address the issue with a "defense in depth" fix that will "prevent IE from sending Firefox malicious data."

cvss

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.9–4.3

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v2.03.9lowAV:N/AC:M/Au:N/C:N/I:P/A:N/E:POCsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-79USprimary

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-30285Microsoft Internet Explorer and Mozilla Firefox - URI Handler Command Injectionfunctional · exploit_db

affected products (4)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
microsoft internet explorer= 6nvdUScpe:2.3:a:microsoft:internet_explorer:*:*:*:*:*:*:*:*
microsoft internet explorer= 7.0nvdUScpe:2.3:a:microsoft:internet_explorer:*:*:*:*:*:*:*:*
mozilla firefoxall versionsnvdUScpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2007-07-10modified 2026-06-16

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+53006 more

references (76)

External citations — patches, advisories, analysis.

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