SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2009-0774

The layout engine in Mozilla Firefox 2 and 3 before 3.0.7, Thunderbird before 2.0.0.21, and SeaMonkey 1.1.15 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via vectors related to gczeal, a different…

HIGH 9.3EPSS 4.05%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (4.05%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

The layout engine in Mozilla Firefox 2 and 3 before 3.0.7, Thunderbird before 2.0.0.21, and SeaMonkey 1.1.15 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via vectors related to gczeal, a different vulnerability than CVE-2009-0773.

CVSS 2.0
9.3 HIGHAV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS
4.05% probability · 91th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-399
Affected
mozilla/firefox · mozilla/seamonkey · mozilla/thunderbird
Source
secalert@redhat.com
EPSS trend
0%3%5%26 October 2026: 4.05%26 October 202626 October 2026

EPSS 4.0% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.