Is CVE-2021-4245 actively exploited?

No active exploitation of CVE-2021-4245 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-4245 be exploited remotely?

Yes. CVE-2021-4245 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-4245?

CVE-2021-4245 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-4245

CWE-74Published: December 15, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

A vulnerability classified as problematic has been found in chbrown rfc6902. This affects an unknown part of the file pointer.ts. The manipulation leads to improperly controlled modification of object prototype attributes ('prototype pollution'). The exploit has been disclosed to the public and may be used. The name of the patch is c006ce9faa43d31edb34924f1df7b79c137096cf. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-215883.

NVD Source

Risk Analysis

The rfc6902 library is affected by a prototype pollution vulnerability in its pointer.ts file. This critical flaw could allow an attacker to manipulate object attributes, potentially leading to unauthorized system behavior.

While no public exploit is currently circulating, the vulnerability is remotely exploitable. It is not listed in the KEV catalog.

Recommended Action

Apply the patch provided by the project maintainers (commit c006ce9faa43d31edb34924f1df7b79c137096cf) to fix the issue.

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-2021-4245 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.