CVE-2021-24115

9.8 criticalEPSS 1.9%

Critical (9.8) in botan project botan. EPSS 1.9% chance of exploitation in the next 30 days.

In Botan before 2.17.3, constant-time computations are not used for certain decoding and encoding operations (base32, base58, base64, and hex).

Severity

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 1.9% chance of exploitation in the next 30 days; higher than 79% of CVEs (scores of 2026-11-01)
Published: 2021-02-22
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19