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CVE-2026-92043

8.8 HIGH
  1. Published15 Sept 2026

Description

Privilege escalation due to incorrect boundary conditions in the Audio/Video component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

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CVE-2026-553318.8
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CVE-2026-920208.8
Privilege escalation due to incorrect boundary conditions in the Graphics: WebRender…
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Privilege escalation due to incorrect boundary conditions in the Graphics component.…
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Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL…

Frequently asked

Is CVE-2026-92043 being actively exploited?

CVE-2026-92043 is not in the CISA KEV catalog.

How severe is CVE-2026-92043?

CVE-2026-92043 has a CVSS 3.1 base score of 8.8, rated high.

How do I fix CVE-2026-92043?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-92043 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.