Search/CVE-2006-4340
● CVE

CVE-2006-4340

VendormozillaProductfirefox, thunderbird, network security services, seamonkeyDiscoveredSep 15, 2006UpdatedApr 16, 2026

Mozilla Network Security Service (NSS) library before 3.11.3, as used in Mozilla Firefox before 1.5.0.7, Thunderbird before 1.5.0.7, and SeaMonkey before 1.0.5, when using an RSA key with exponent 3, does not properly handle extra data in a signature, which allows remote attackers to forge signatures for SSL/TLS and email certificates, a similar vulnerability to CVE-2006-4339. NOTE: on 20061107, Mozilla released an advisory stating that these versions were not completely patched by MFSA2006-60. The newer fixes for 1.5.0.7 are covered by CVE-2006-5462.

CVSS v3.1
—
EPSS
2.32%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Aug 16, 2026 → Oct 22, 2026
▲ 0.04pp
2.28% → 2.32% over 2 tracked changes
Connections
5 relationships
Timeline
disclosure → media coverage
Sep 15, 2006
Disclosure — published as a CVE record. · last revised by NVD Apr 16, 2026