SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2009-2535

Mozilla Firefox before 2.0.0.19 and 3.x before 3.0.5, SeaMonkey, and Thunderbird allow remote attackers to cause a denial of service (memory consumption and application crash) via a large integer value for the length property of a Select object, a…

EXPLOIT ✓MEDIUM 5.0EPSS 9.36%

Does this matter?

A public exploit is published in Exploit-DB (verified), so the technical barrier is gone even though the severity is medium and EPSS is 9.4%. Treat it as high on anything reachable from the internet.

Description

Mozilla Firefox before 2.0.0.19 and 3.x before 3.0.5, SeaMonkey, and Thunderbird allow remote attackers to cause a denial of service (memory consumption and application crash) via a large integer value for the length property of a Select object, a related issue to CVE-2009-1692.

CVSS 2.0
5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS
9.36% probability · 95th percentile
Public exploits
1 in Exploit-DB · verified · first 15 July 2009
CISA KEV
Not listed
Weakness
CWE-189
Affected
mozilla/firefox · mozilla/seamonkey · mozilla/thunderbird
Source
cve@mitre.org
EPSS trend
0%5%10%26 October 2026: 9.36%26 October 202626 October 2026

EPSS 9.4% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Public exploits (1)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-9160source ↗Multiple Browsers - Denial of Servicemultiple · Thierry Zollerdos15 July 2009yes

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