Is CVE-2022-34476 actively exploited?

No active exploitation of CVE-2022-34476 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2022-34476 be exploited remotely?

Yes. CVE-2022-34476 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2022-34476?

CVE-2022-34476 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2022-34476

NVD-CWE-noinfoPublished: December 22, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

ASN.1 parsing of an indefinite SEQUENCE inside an indefinite GROUP could have resulted in the parser accepting malformed ASN.1. This vulnerability affects Firefox < 102.

NVD Source

Risk Analysis

An ASN.1 parsing flaw in Firefox allows the acceptance of malformed data, which could lead to critical security impacts. The vulnerability is remotely exploitable.

No public exploit is known, and the vulnerability is not in the CISA KEV catalog.

Recommended Action

Update Firefox to version 102 or later to ensure the ASN.1 parser is properly secured.

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-2022-34476 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.