SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2014-1523

Heap-based buffer overflow in the read_u32 function in Mozilla Firefox before 29.0, Firefox ESR 24.x before 24.5, Thunderbird before 24.5, and SeaMonkey before 2.26 allows remote attackers to cause a denial of service (out-of-bounds read and application…

MEDIUM 6.5EPSS 3.15%

Does this matter?

Lower severity and a low EPSS score (3.15%). Track it; it rarely justifies an emergency change on its own.

Description

Heap-based buffer overflow in the read_u32 function in Mozilla Firefox before 29.0, Firefox ESR 24.x before 24.5, Thunderbird before 24.5, and SeaMonkey before 2.26 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted JPEG image.

CVSS 3.1
6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS
3.15% probability · 88th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-787
Affected
mozilla/firefox · mozilla/seamonkey · mozilla/thunderbird · fedoraproject/fedora · debian/debian linux · canonical/ubuntu linux · redhat/enterprise linux desktop · redhat/enterprise linux eus · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux server tus · redhat/enterprise linux workstation · opensuse/opensuse · suse/suse linux enterprise server
Source
security@mozilla.org
EPSS trend
0%3%5%26 October 2026: 3.15%26 October 202626 October 2026

EPSS 3.1% 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.