AUGUST 4, 2026
Live Feed
Back to database
Case File

CVE-2021-43398

MEDIUM · CVSS 5.3 EPSS 1.90% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-11-04 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

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

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

CVE
CVE-2021-43398
Severity
MEDIUM
CVSS
5.3
EPSS
1.90%

Original NVD Description

Crypto++ (aka Cryptopp) 8.6.0 and earlier contains a timing leakage in MakePublicKey(). There is a clear correlation between execution time and private key length, which may cause disclosure of the length information of the private key. This might allow attackers to conduct timing attacks. NOTE: this report is disputed by the vendor and multiple third parties. The execution-time differences are intentional. A user may make a choice of a longer key as a tradeoff between strength and performance. In making this choice, the amount of information leaked to an adversary is of infinitesimal value