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Case File

CVE-2021-40529

MEDIUM · CVSS 5.9 EPSS 1.53% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-09-06 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 5.9. Public exploit code or proof-of-concept references have been detected in its references.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-40529
Severity
MEDIUM
CVSS
5.9
EPSS
1.53%

Original NVD Description

The ElGamal implementation in Botan through 2.18.1, as used in Thunderbird and other products, allows plaintext recovery because, during interaction between two cryptographic libraries, a certain dangerous combination of the prime defined by the receiver's public key, the generator defined by the receiver's public key, and the sender's ephemeral exponents can lead to a cross-configuration attack against OpenPGP.

Related CVEs

Other vulnerabilities affecting the same vendor(s)