CVE-2026-6761
Privilege escalation in the Networking component
HIGH
8.8
CVSS Score
Published: April 21, 2026 at 12:40 PM UTC
Updated: October 26, 2026 at 10:10 PM UTC
2 products affected across 1 vendorFirefoxThunderbird
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Severity
HIGH8.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit
Description
Privilege escalation in the Networking component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 140.10.0v < 150.0
Vendor states this is fixed in 140.10 (unaffected)
Vendor states this is fixed in 150 (unaffected)
v < 140.10.0
Vendor states this is fixed in 140.10 (unaffected)
Vendor states this is fixed in 150 (unaffected)
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (5)
SSVC — Action Prioritization
SSVCNo known exploitNot automatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
8.8HIGHCISA-ADP
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusANALYZED
CWE
CWE-269
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