Search/CVE-2026-6751
● CVE — High

CVE-2026-6751

VendormozillaProductfirefox, thunderbirdDiscoveredApr 21, 2026UpdatedOct 26, 2026

Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

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CVSS v3.1
7.3 HIGH
EPSS
0.31%
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
Sep 25, 2026 → Oct 26, 2026
▼ 0.15pp
0.46% → 0.31% over 2 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
ConfidentialityLOW
IntegrityLOW
AvailabilityLOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Connections
4 relationships
Timeline
disclosure → media coverage
Apr 21, 2026
Disclosure — published as a CVE record. · last revised by NVD Oct 26, 2026