VULNERABILITY INTELLIGENCE

CVE-2013-2566

CVSS score5.9 MEDIUM
EPSS probability84.42%
CISA KEVNot currently listed
Published2013-03-15
Last modified2026-06-16
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Description

The RC4 algorithm, as used in the TLS protocol and SSL protocol, has many single-byte biases, which makes it easier for remote attackers to conduct plaintext-recovery attacks via statistical analysis of ciphertext in a large number of sessions that use the same plaintext.

Weakness classification

  • CWE-326: Inadequate Encryption Strength
  • CWE-327: Use of a Broken or Risky Cryptographic Algorithm

Primary references