CVE-2024-5702Network attack vector

Client crash via networking use-after-free

Published Jun 11, 2024 · Updated Aug 12, 2024

Use-after-free in Mozilla Firefox before 125, Firefox ESR before 115.12, and Thunderbird before 115.12 allows remote attackers to crash the client. In nsHttpTransaction::OnTransportStatus, the networking code calls through a raw mTransportSink pointer after its referenced object has been deleted. Network reachability to the affected client is sufficient; successful triggering terminates the application without reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Mozilla Firefox before 125, Firefox ESR before 115.12, and Thunderbird before 115.12 allows remote attackers to crash the client. In nsHttpTransaction::OnTransportStatus, the networking code calls through a raw mTransportSink pointer after its referenced object has been deleted. Network reachability to the affected client is sufficient; successful triggering terminates the application without reported data disclosure or modification.

The record

CVE
CVE-2024-5702
Published
Jun 11, 2024
Updated
Aug 12, 2024
Vendor
Mozilla
Product
Firefox
Classifications
CWE-416, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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 <125
  2. Affected versionversion=unspecified <125

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=0 <125; version=unspecified <125
Mozilla · Thunderbirdversion=0 <115.12; version=unspecified <115.12
Mozilla · Firefox ESRversion=0 <115.12; version=unspecified <115.12

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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

CWE-416Use After Free
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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