CVE-2006-1993
MediumPublic exploitMozilla 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…
Published May 9, 2006 · Updated Mar 9, 2026 · Also known as DEBIAN-CVE-2006-1993, DSA-1053-1, DSA-1055-1
Key Facts
Patch immediately- CVE-2006-1993 is a medium-severity vulnerability (CVSS 5.1 v2) affecting Firefox (Mozilla), mozilla (debian), mozilla-firefox (debian).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 54% probability of exploitation in the next 30 days.
- Fixed versions are available, including Firefox 1.5.dfsg+1.5.0.3-1, mozilla 2:1.7.8-1sarge6, mozilla-firefox 1.0.4-2sarge7.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v2
5.1
AV:N/AC:H/Au:N/C:P/I:P/A:P
EPSS (30-day exploit likelihood)
54%
Higher than 98.9% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2006-1993 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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.
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| FirefoxMozilla | 1.5.0.2 | 1.5.dfsg+1.5.0.3-1 |
| mozilladebian | See advisory | 2:1.7.8-1sarge6 |
| mozilla-firefoxdebian | See advisory | 1.0.4-2sarge7 |
Patched Releases
Firefox
1.5.dfsg+1.5.0.3-1
mozilla
2:1.7.8-1sarge6
mozilla-firefox
1.0.4-2sarge7
Timeline
Publicly disclosed
May 9, 2006
Last updated
Mar 9, 2026
Weakness Type
- CWE-399
References
FAQ
Common Questions.
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.
Affected: Firefox (Mozilla) versions 1.5.0.2; mozilla (debian); mozilla-firefox (debian). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Firefox 1.5.dfsg+1.5.0.3-1, mozilla 2:1.7.8-1sarge6, mozilla-firefox 1.0.4-2sarge7.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
Is CVE-2006-1993 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo