SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2016-9074

This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.

MEDIUM 5.9EPSS 2.36%

Does this matter?

Lower severity and a low EPSS score (2.36%). Track it; it rarely justifies an emergency change on its own.

Description

An existing mitigation of timing side-channel attacks is insufficient in some circumstances. This issue is addressed in Network Security Services (NSS) 3.26.1. This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.

CVSS 3.0
5.9 MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
2.36% probability · 84th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-200
Affected
mozilla/firefox · mozilla/thunderbird · debian/debian linux
Source
security@mozilla.org
EPSS trend
0%3%5%27 October 2026: 2.36%27 October 202627 October 2026

EPSS 2.4% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

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