Is CVE-2023-5168 actively exploited?

No active exploitation of CVE-2023-5168 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-5168 be exploited remotely?

Yes. CVE-2023-5168 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-5168?

CVE-2023-5168 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-5168

CWE-787Published: September 27, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

A compromised content process could have provided malicious data to `FilterNodeD2D1` resulting in an out-of-bounds write, leading to a potentially exploitable crash in a privileged process.

*This bug only affects Firefox on Windows. Other operating systems are unaffected.* This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3.

NVD Source

Risk Analysis

This vulnerability involves an out-of-bounds write in Firefox on Windows, triggered by malicious data provided to the FilterNodeD2D1 component. Due to its critical CVSS score of 9.8, it represents a significant risk as it could lead to code execution in a privileged process.

There is no known public exploit for this vulnerability, and it is not currently listed in the CISA KEV catalog. It is remotely exploitable with low attack complexity.

Recommended Action

Users should update Firefox to version 118 or later, Firefox ESR to 115.3 or later, and Thunderbird to 115.3 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-2023-5168 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.