Siemens SIMATIC Logon vulnerabilities

3 CVEs affecting Siemens SIMATIC Logon, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2021-3449, published 2021-03-25.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2021-3449, published 2021-03-25. Medium severity, CVSS 5.9. EPSS: 63.5% chance of exploitation in the next 30 days. An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where…
• CVE-2017-9938, published 2017-08-08. High severity, CVSS 7.5. EPSS: 2.9% chance of exploitation in the next 30 days. A vulnerability was discovered in Siemens SIMATIC Logon (All versions before V1.6) that could allow specially crafted packets sent to the SIMATIC Logon Remote Access service on port 16389/tcp to…
• CVE-2017-2684, published 2017-02-22. Critical severity, CVSS 9.0. EPSS: 2% chance of exploitation in the next 30 days. Siemens SIMATIC Logon prior to V1.5 SP3 Update 2 could allow an attacker with knowledge of a valid user name, and physical or network access to the affected system, to bypass the application-level…