CVE-2009-3987
The GeckoActiveXObject function in Mozilla Firefox before 3.0.16 and 3.5.x before 3.5.6, and SeaMonkey before 2.0.1, generates different…
- 7.8HighCVSS base score
- 1.6%Exploitation in 30 daysEPSS · top 24% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
The GeckoActiveXObject function in Mozilla Firefox before 3.0.16 and 3.5.x before 3.5.6, and SeaMonkey before 2.0.1, generates different exception messages depending on whether the referenced COM object is listed in the registry, which allows remote attackers to obtain potentially sensitive information about installed software by making multiple calls that specify the ProgID values of different COM objects.
Timeline
ID reserved
By mitre
- 28 days later
· 28 days later
Published
- 15 years later
· 15 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.8 | AV:N/AC:L/Au:N/C:C/I:N/A:N |
- EPSS (exploitation in 30 days)
- 1.6% · top 24% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
n/a
- affected n/a
References
12
- 37699 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- https://bugzilla.mozilla.org/show_bug.cgi?id=503451 (opens in a new tab)x_refsource_CONFIRMx_transferred
- ADV-2009-3547 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 37785 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- oval:org.mitre.oval:def:7958 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=546729 (opens in a new tab)x_refsource_CONFIRMx_transferred
- 37349 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- firefox-geckoactivexobject-info-disclosure(54798) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 1023347 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 37360 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 1023346 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- http://www.mozilla.org/security/announce/2009/mfsa2009-71.html (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2009-3958 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2009-3987)Record last updated .