Is CVE-2025-27105 actively exploited?

No active exploitation of CVE-2025-27105 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-27105 be exploited remotely?

Yes. CVE-2025-27105 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-27105?

CVE-2025-27105 has a CVSS score of 9.1 (CRITICAL).

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CRITICAL

CVE-2025-27105

CWE-787Published: February 21, 2025· Updated: Jun 17, 2026

9.1

CVSS v3.1

Official Description

vyper is a Pythonic Smart Contract Language for the EVM. Vyper handles AugAssign statements by first caching the target location to avoid double evaluation. However, in the case when target is an access to a DynArray and the rhs modifies the array, the cached target will evaluate first, and the bounds check will not be re-evaluated during the write portion of the statement. This issue has been addressed in version 0.4.1 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

NVD Source

Technical Analysis

CVE-2025-27105 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 full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.1.

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