Is CVE-2025-6203 actively exploited?

No active exploitation of CVE-2025-6203 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-6203 be exploited remotely?

Yes. CVE-2025-6203 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-6203?

CVE-2025-6203 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2025-6203

HIGH

CVE-2025-6203

CWE-770Published: August 28, 2025· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

A malicious user may submit a specially-crafted complex payload that otherwise meets the default request size limit which results in excessive memory and CPU consumption of Vault. This may lead to a timeout in Vault’s auditing subroutine, potentially resulting in the Vault server to become unresponsive. This vulnerability, CVE-2025-6203, is fixed in Vault Community Edition 1.20.3 and Vault Enterprise 1.20.3, 1.19.9, 1.18.14, and 1.16.25.

NVD Source

Technical Analysis

CVE-2025-6203 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 availability disruption (denial of service), with a CVSS base score of 7.5.