CVE-2024-1553Network attack vector

Arbitrary code execution via memory corruption

Published Feb 20, 2024 · Updated Mar 13, 2025

Memory safety flaws in Firefox before 123, Firefox ESR before 115.8, and Thunderbird before 115.8 allow remote attackers to execute arbitrary code. Mozilla links the CVE to multiple memory-safety defects that corrupt memory, but the public advisory does not identify one shared function or erroneous operation. Network-delivered content can reach affected browser code without authentication; ordinary email reading in Thunderbird disables scripting and limits that route.

CVSS severity8.1
High
EPSS probability0.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory safety flaws in Firefox before 123, Firefox ESR before 115.8, and Thunderbird before 115.8 allow remote attackers to execute arbitrary code. Mozilla links the CVE to multiple memory-safety defects that corrupt memory, but the public advisory does not identify one shared function or erroneous operation. Network-delivered content can reach affected browser code without authentication; ordinary email reading in Thunderbird disables scripting and limits that route.

The record

CVE
CVE-2024-1553
Published
Feb 20, 2024
Updated
Mar 13, 2025
Vendor
Debian
Product
Debian GNU/Linux
Classifications
CWE-119, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 20, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 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=10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Debian · Debian GNU/Linuxversion=10.0
Mozilla · Firefoxversion=0 <123; version=unspecified <123
Mozilla · Thunderbirdversion=0 <115.8; version=unspecified <115.8
Mozilla · Firefox ESRversion=0 <115.8; version=unspecified <115.8

Published CVSS scores

8.1CISA-ADPCVSS:3.1/AV:N/AC:H/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

CWE-119Improper Restriction of Operations within the Bounds of a Memory 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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