CVE-2024-0755Network attack vector

Arbitrary code execution via memory corruption

Published Jan 23, 2024 · Updated May 22, 2025

Memory corruption in Mozilla Firefox before 122, Firefox ESR before 115.7, and Thunderbird before 115.7 allows remote attackers to execute code. Mozilla identifies three underlying memory-safety bugs but withholds their affected code locations and the invalid operations that corrupt memory. Exploitation requires user interaction with attacker-controlled content; successful exploitation runs code in the affected application's security context.

CVSS severity8.8
High
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Mozilla Firefox before 122, Firefox ESR before 115.7, and Thunderbird before 115.7 allows remote attackers to execute code. Mozilla identifies three underlying memory-safety bugs but withholds their affected code locations and the invalid operations that corrupt memory. Exploitation requires user interaction with attacker-controlled content; successful exploitation runs code in the affected application's security context.

The record

CVE
CVE-2024-0755
Published
Jan 23, 2024
Updated
May 22, 2025
Vendor
Mozilla
Product
Firefox
Classifications
CWE-94, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 23, 2024CVE publishedPublication date reported by the CVE source.
  2. May 22, 2025Record 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=unspecified <122

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=unspecified <122
Mozilla · Thunderbirdversion=unspecified <115.7
Mozilla · Firefox ESRversion=unspecified <115.7

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1203Exploitation for Client Execution

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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