CVE-2024-5700

Arbitrary code execution via memory corruption

Published Jun 11, 2024 · Updated Aug 1, 2024

Memory corruption in Mozilla Firefox before 127, Firefox ESR before 115.12, and Thunderbird before 115.12 allows attackers to run arbitrary code. Mozilla identifies four underlying memory-safety bugs but does not publicly disclose their code loci or the invalid memory operations involved. Exploitation requires local access and user interaction under CISA's assessment; Thunderbird disables scripting while reading email.

CVSS severity7.0
High
EPSS probability0.44%
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 127, Firefox ESR before 115.12, and Thunderbird before 115.12 allows attackers to run arbitrary code. Mozilla identifies four underlying memory-safety bugs but does not publicly disclose their code loci or the invalid memory operations involved. Exploitation requires local access and user interaction under CISA's assessment; Thunderbird disables scripting while reading email.

The record

CVE
CVE-2024-5700
Published
Jun 11, 2024
Updated
Aug 1, 2024
Vendor
Mozilla
Product
Firefox
Classifications
CWE-788, CWE-786, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <127
  2. Affected versionversion=unspecified <127

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=0 <127; version=unspecified <127
Mozilla · Thunderbirdversion=0 <115.12; version=unspecified <115.12
Mozilla · Firefox ESRversion=0 <115.12; version=unspecified <115.12

Published CVSS scores

7.0CISA-ADPCVSS:3.1/AV:L/AC:H/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-788Access of Memory Location After End of Buffer
CWE-786Access of Memory Location Before Start of Buffer
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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