How severe is CVE-2019-18339?

CVE-2019-18339 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-18339 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-18339?

CVE-2019-18339 primarily affects Siemens Sinvr 3 Central Control Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-18339?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2019-18339 published?

CVE-2019-18339 was published on 2019-12-12 and last updated on 2026-06-17.

CVE-2019-18339

CVE-2019-18339 is a critical-severity vulnerability in Siemens Sinvr 3 Central Control Server with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Siemens Sinvr 3 Central Control Server
Published: 2019-12-12
Last modified: 2026-06-17

Description

A vulnerability has been identified in SiNVR/SiVMS Video Server (All versions < V5.0.0). The HTTP service (default port 5401/tcp) of the SiVMS/SiNVR Video Server contains an authentication bypass vulnerability, even when properly configured with enforced authentication. A remote attacker with network access to the Video Server could exploit this vulnerability to read the SiVMS/SiNVR users database, including the passwords of all users in obfuscated cleartext.

Frequently asked questions

What is CVE-2019-18339?: A vulnerability has been identified in SiNVR/SiVMS Video Server (All versions < V5.0.0). The HTTP service (default port 5401/tcp) of the SiVMS/SiNVR Video Server contains an authentication bypass vulnerability, even when properly configured with enforced authentication. A remote attacker with network access to the Video Server could exploit this vulnerability to read the SiVMS/SiNVR users database, including the passwords of all users in obfuscated cleartext.
How severe is CVE-2019-18339?: CVE-2019-18339 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-18339 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-18339?: CVE-2019-18339 primarily affects Siemens Sinvr 3 Central Control Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-18339?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-18339 published?: CVE-2019-18339 was published on 2019-12-12 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-761617.pdf

Affected products (2)

cpe:2.3:a:siemens:sinvr_3_central_control_server:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:sinvr_3_video_server:*:*:*:*:*:*:*:*

More vulnerabilities in Siemens Sinvr 3 Central Control Server

CVE-2019-18337 — Critical (CVSS 9.8): A vulnerability has been identified in Control Center Server (CCS) (All versions < V1.5.0). The Control Center Server…
CVE-2019-19292 — High (CVSS 8.8): A vulnerability has been identified in Control Center Server (CCS) (All versions < V1.5.0). The Control Center Server…
CVE-2019-18338 — High (CVSS 7.7): A vulnerability has been identified in Control Center Server (CCS) (All versions < V1.5.0). The Control Center Server…
CVE-2019-19297 — High (CVSS 7.5): A vulnerability has been identified in SiNVR/SiVMS Video Server (All versions < V5.0.0). The streaming service (default…
CVE-2019-19296 — Medium (CVSS 6.8): A vulnerability has been identified in SiNVR/SiVMS Video Server (All versions < V5.0.0). The two FTP services (default…
CVE-2019-19290 — Medium (CVSS 6.5): A vulnerability has been identified in Control Center Server (CCS) (All versions < V1.5.0). The DOWNLOADS section in…

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