What’s Vulnerable › Vulnerabilities

CVE-2001-1476

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2001-01-18 · updated 2026-06-16

Description

SSH before 2.0, with RC4 encryption and the "disallow NULL passwords" option enabled, makes it easier for remote attackers to guess portions of user passwords by replaying user sessions with certain modifications, which trigger different messages depending on whether the guess is correct or not.

Affected products

• Ssh: 1.2.24, 1.2.25, 1.2.26, 1.2.27, 1.2.28, 1.2.29 (+2)

References

• http://www.kb.cert.org/vuls/id/565052
• https://exchange.xforce.ibmcloud.com/vulnerabilities/6490
• http://www.kb.cert.org/vuls/id/565052
• https://exchange.xforce.ibmcloud.com/vulnerabilities/6490

Get alerted when CVE-2001-1476 or the next vulnerability affects your stack