Siemens SIMATIC Wincc Telecontrol vulnerabilities

2 CVEs affecting Siemens SIMATIC Wincc Telecontrol, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2025-30033, published 2025-08-12.

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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-2025-30033, published 2025-08-12. High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days. The affected setup component is vulnerable to DLL hijacking. This could allow an attacker to execute arbitrary code when a legitimate user installs an application that uses the affected setup…