How severe is CVE-2020-10039?

CVE-2020-10039 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-10039 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-10039?

CVE-2020-10039 primarily affects Siemens Sicam Mmu Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-10039?

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

When was CVE-2020-10039 published?

CVE-2020-10039 was published on 2020-07-14 and last updated on 2026-06-17.

CVE-2020-10039

CVE-2020-10039 is a high-severity vulnerability in Siemens Sicam Mmu Firmware with a CVSS 3.x base score of 8.1. 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-311.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 6.8
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-311
Affected product: Siemens Sicam Mmu Firmware
Published: 2020-07-14
Last modified: 2026-06-17

Description

A vulnerability has been identified in SICAM MMU (All versions < V2.05), SICAM SGU (All versions), SICAM T (All versions < V2.18). An attacker in a privileged network position between a legitimate user and the web server might be able to conduct a Man-in-the-middle attack and gain read and write access to the transmitted data.

Frequently asked questions

What is CVE-2020-10039?: A vulnerability has been identified in SICAM MMU (All versions < V2.05), SICAM SGU (All versions), SICAM T (All versions < V2.18). An attacker in a privileged network position between a legitimate user and the web server might be able to conduct a Man-in-the-middle attack and gain read and write access to the transmitted data.
How severe is CVE-2020-10039?: CVE-2020-10039 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-10039 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-10039?: CVE-2020-10039 primarily affects Siemens Sicam Mmu Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-10039?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-10039 published?: CVE-2020-10039 was published on 2020-07-14 and last updated on 2026-06-17.

References

https://cert-portal.siemens.com/productcert/pdf/ssa-305120.pdf

Affected products (3)

cpe:2.3:o:siemens:sicam_mmu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:sicam_sgu_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:siemens:sicam_t_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Siemens Sicam Mmu Firmware

CVE-2020-10042 — Critical (CVSS 9.8): A vulnerability has been identified in SICAM MMU (All versions < V2.05), SICAM SGU (All versions), SICAM T (All…
CVE-2020-10038 — Critical (CVSS 9.8): A vulnerability has been identified in SICAM MMU (All versions < V2.05), SICAM SGU (All versions), SICAM T (All…
CVE-2020-10045 — High (CVSS 8.8): A vulnerability has been identified in SICAM MMU (All versions < V2.05), SICAM SGU (All versions), SICAM T (All…
CVE-2020-10044 — High (CVSS 7.5): A vulnerability has been identified in SICAM MMU (All versions < V2.05), SICAM SGU (All versions), SICAM T (All…
CVE-2020-10037 — High (CVSS 7.5): A vulnerability has been identified in SICAM MMU (All versions < V2.05), SICAM SGU (All versions), SICAM T (All…
CVE-2020-10043 — Medium (CVSS 6.1): A vulnerability has been identified in SICAM MMU (All versions < V2.05), SICAM SGU (All versions), SICAM T (All…

All CVEs affecting Siemens Sicam Mmu Firmware →

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