Is CVE-2023-4057 actively exploited?

No active exploitation of CVE-2023-4057 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-4057 be exploited remotely?

Yes. CVE-2023-4057 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-4057?

CVE-2023-4057 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2023-4057

CRITICAL

CVE-2023-4057

CWE-787Published: August 1, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Memory safety bugs present in Firefox 115, Firefox ESR 115.0, and Thunderbird 115.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 116, Firefox ESR < 115.1, and Thunderbird < 115.1.

NVD Source

Risk Analysis

Memory safety vulnerabilities in Firefox, Firefox ESR, and Thunderbird could allow for memory corruption and potential arbitrary code execution. These are critical flaws affecting multiple Mozilla products.

No public exploit is known, and it is not in CISA KEV. It is remotely exploitable with low complexity.

Recommended Action

Update Firefox to 116, Firefox ESR to 115.1, and Thunderbird to 115.1 or later.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-4057 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.