What is CVE-2025-21607?

CVE-2025-21607 is a high-severity vulnerability in Vyperlang Vyper, classified under Always-Incorrect Control Flow Implementation. CVSS score: 7.5/10. Published 2025-01-14.

How severe is CVE-2025-21607?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Vyperlang Vyper

CVE-2025-21607

Vyper is a Pythonic Smart Contract Language for the EVM. When the Vyper Compiler uses the precompiles EcRecover (0x1) and Identity (0x4), the success flag of the call is not checked. As a consequence an attacker can provide a specific amou…

EPSS: 0.006 (46.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Vyperlang Vyper — versions < 0.4.1

Weakness classification (CWE)

CWE-670 — Always-Incorrect Control Flow Implementation

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-21607?: CVE-2025-21607 is a high-severity vulnerability in Vyperlang Vyper, classified under Always-Incorrect Control Flow Implementation. CVSS score: 7.5/10. Published 2025-01-14.
How severe is CVE-2025-21607?: High severity. CVSS v3 base score is 7.5 out of 10.