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SSLTLScybersecurity
SSL/TLS in 2025: Why TLS 1.0 and 1.1 Are Still a Risk
Published on 2/20/20256 min read
The TLS 1.0 and 1.1 Problem
Despite TLS 1.0 and 1.1 being officially deprecated by the IETF in 2021 (RFC 8996), a significant percentage of web servers continue to support them. This exposes them to known vulnerabilities like BEAST, POODLE, and weak cipher suite issues.
Real Risks
- BEAST Attack: exploits a vulnerability in TLS 1.0's CBC mode
- POODLE: downgrade attack forcing use of vulnerable protocols
- Weak cipher suites: RC4, DES, 3DES still supported on TLS 1.0/1.1
- PCI DSS non-compliance: since 2018 PCI DSS requires at least TLS 1.2
How to Check Your Configuration
SecureScan offers an SSL/TLS Analysis service that checks TLS versions, cipher suites, certificate validity, known vulnerabilities, and PCI DSS compliance.
Recommendations
- Disable TLS 1.0 and 1.1 on all servers
- Enable TLS 1.3 where possible
- Remove weak cipher suites (RC4, DES, 3DES, MD5)
- Run regular SSL/TLS Analysis with SecureScan