CVE-2024-11698Network attack vector

Fullscreen lock-up via interrupted modal transition

Published Nov 26, 2024 · Updated Nov 27, 2024

Denial of service in Firefox before 133, Firefox ESR before 128.5, and Thunderbird allows attackers to lock macOS fullscreen via a modal save dialog. The dialog interrupts a native fullscreen transition, leaving Gecko and macOS with conflicting window-state views and no standard exit path. Thunderbird Release before 133 and ESR before 128.5 are affected when the setting that always asks where to save files is enabled, and recovery requires restarting the application.

CVSS severity9.8
Critical
EPSS probability0.69%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Firefox before 133, Firefox ESR before 128.5, and Thunderbird allows attackers to lock macOS fullscreen via a modal save dialog. The dialog interrupts a native fullscreen transition, leaving Gecko and macOS with conflicting window-state views and no standard exit path. Thunderbird Release before 133 and ESR before 128.5 are affected when the setting that always asks where to save files is enabled, and recovery requires restarting the application.

The record

CVE
CVE-2024-11698
Published
Nov 26, 2024
Updated
Nov 27, 2024
Vendor
Mozilla
Product
Firefox
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 27, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <133
  2. Affected versionversion=unspecified <133

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=0 <133; version=unspecified <133
Mozilla · Thunderbirdversion=0 <128.5; version=0 <133; version=unspecified <128.5; version=unspecified <133
Mozilla · Firefox ESRversion=0 <128.5; version=unspecified <128.5

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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