CVE-2021-33560

HighCVSS 7.5/10Last modified Oct 14, 2026

Description

Libgcrypt before 1.8.8 and 1.9.x before 1.9.3 mishandles ElGamal encryption because it lacks exponent blinding to address a side-channel attack against mpi_powm, and the window size is not chosen appropriately. This, for example, affects use of ElGamal in OpenPGP.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-203 CWE-325

Affected software

No affected versions have been published.

Timeline

Published: Jun 8, 2021
Last modified: Oct 14, 2026
NVD status: Modified

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