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    CVE-2006-1993

    Mozilla Firefox 1.5.0.2, when designMode is enabled, allows remote attackers to cause a denial of service and possibly execute arbitrary code via certain Javascript that is not properly handled by the contentWindow.focus method in an iframe, which causes a reference to a deleted controller context object. NOTE: this was originally claimed to be a buffer overflow in (1) js320.dll and (2) xpcom_core.dll, but the vendor disputes this claim.

    Published:Apr 25, 2006
    Last Modified:Apr 16, 2026
    EPS:Apr 25, 2006
    EPSS Score:0.57321
    CVSS Score:5.1

    Affected Products

    Vendor
    Mozilla
    Product
    Firefox

    Exploits

    http://securitytracker.com/id?1015981http://www.securident.com/vuln/ff.txthttp://www.securityfocus.com/bid/17671http://securitytracker.com/id?1015981http://www.securident.com/vuln/ff.txthttp://www.securityfocus.com/bid/17671https://www.exploit-db.com/exploits/1716

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-84144 (CVSS 7.5) — Internally found bugs present in Thunderbird 154 and Thunderbird ESR 153.1. Some of these bugs showed evidence…
    CVE-2026-84143 (CVSS 9.8) — Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of th…
    CVE-2026-84142 (CVSS 9.8) — Internally found bugs present in Thunderbird 154. Some of these bugs showed evidence of memory corruption or a…
    CVE-2026-84141 (CVSS 9.8) — Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155, Firefox ESR…
    CVE-2026-84140 (CVSS 9.8) — Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ES…
    CVE-2026-84139 (CVSS 6.1) — Clickjacking issue in the DOM: Events component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.…
    CVE-2026-84138 (CVSS 6.5) — Denial-of-service in the PDF Viewer component. This vulnerability was fixed in Firefox 155 and Thunderbird 155…
    CVE-2026-84137 (CVSS 4.3) — Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 153…
    CVE-2026-84136 (CVSS 6.1) — Other issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, …
    CVE-2026-84135 (CVSS 9.8) — Other issue in Firefox Focus for Android. This vulnerability was fixed in Firefox 155.…

    References

    http://secunia.com/advisories/19802
    http://secunia.com/advisories/20015
    http://secunia.com/advisories/20019
    http://secunia.com/advisories/20070
    http://secunia.com/advisories/20214
    http://secunia.com/advisories/22066
    http://securityreason.com/securityalert/780
    http://securitytracker.com/id?1015981
    http://www.debian.org/security/2006/dsa-1053
    http://www.debian.org/security/2006/dsa-1055
    http://www.gentoo.org/security/en/glsa/glsa-200605-06.xml
    http://www.kb.cert.org/vuls/id/866300
    http://www.mozilla.org/security/announce/2006/mfsa2006-30.html
    http://www.securident.com/vuln/ff.txt
    http://www.securityfocus.com/archive/1/431878/100/0/threaded
    http://www.securityfocus.com/archive/1/434524/100/0/threaded
    http://www.securityfocus.com/archive/1/446658/100/200/threaded
    http://www.securityfocus.com/bid/17671
    http://www.vupen.com/english/advisories/2006/1614
    http://www.vupen.com/english/advisories/2006/1922
    http://www.vupen.com/english/advisories/2006/3748
    http://www.vupen.com/english/advisories/2008/0083
    https://exchange.xforce.ibmcloud.com/vulnerabilities/25994
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1790
    http://secunia.com/advisories/19802
    http://secunia.com/advisories/20015
    http://secunia.com/advisories/20019
    http://secunia.com/advisories/20070
    http://secunia.com/advisories/20214
    http://secunia.com/advisories/22066
    http://securityreason.com/securityalert/780
    http://securitytracker.com/id?1015981
    http://www.debian.org/security/2006/dsa-1053
    http://www.debian.org/security/2006/dsa-1055
    http://www.gentoo.org/security/en/glsa/glsa-200605-06.xml
    http://www.kb.cert.org/vuls/id/866300
    http://www.mozilla.org/security/announce/2006/mfsa2006-30.html
    http://www.securident.com/vuln/ff.txt
    http://www.securityfocus.com/archive/1/431878/100/0/threaded
    http://www.securityfocus.com/archive/1/434524/100/0/threaded
    http://www.securityfocus.com/archive/1/446658/100/200/threaded
    http://www.securityfocus.com/bid/17671
    http://www.vupen.com/english/advisories/2006/1614
    http://www.vupen.com/english/advisories/2006/1922
    http://www.vupen.com/english/advisories/2006/3748
    http://www.vupen.com/english/advisories/2008/0083
    https://exchange.xforce.ibmcloud.com/vulnerabilities/25994
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1790

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High