No exploitation reportedFix available

CVE-2020-10040

Q: Is CVE-2020-10040 actively exploited?

Active exploitation of CVE-2020-10040 has not been confirmed. Its EPSS score was 0.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2020-10040?

CVE-2020-10040 has a CVSS v3 base score of 5.5 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

No exploitation reported by the sources we read.

Published2020-07-14
Fixed in2.05
WeaknessCWE-916

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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 with local access to the device might be able to retrieve some passwords in clear text.

Timeline

dates in UTC

2020-07-1414:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-10040?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-10040?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Siemens sicam mmu firmwareversion to verify

Branch	Affected	Fixed in	Source
2.5	< 2.05	2.05	NVD

Siemens sicam sgu firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

Siemens sicam t firmwareversion to verify

Branch	Affected	Fixed in	Source
2.18	< 2.18	2.18	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-20-196-03 CISA3 known affected
Siemens SICAM MMU, SICAM T, and SICAM SGU
Siemens SICAM MMU: All versions < V2.05 · Siemens SICAM SGU: All versions · Siemens SICAM T: All versions < V2.18

Full record on NVD

Fix

Update Siemens sicam mmu firmware to 2.05
Vendor fix CISA ICSA-20-196-03 · 1 productUpdate to V2.05 to introduce authentication in the web application to mitigate some web
Vendor fix CISA ICSA-20-196-03 · 1 productUpdate to V2.18 to introduce authentication in the web application to mitigate some web
Mitigation from the vendor CISA ICSA-20-196-03 · 3 productsThe firmware updates to SICAM T and SICAM MMU introduce authentication to the web application and remove some unnecessary functionality. The web authentication functionality reduces the risk of access to the device's web application for executing administrative commands by unauthenticated users.
Mitigation from the vendor CISA ICSA-20-196-03 · 3 productsDue to hardware constraints, encryption is not possible on the devices. Confidential data such as passwords handled by the devices need to be protected on the network by other means, e.g.'by VPN.
Mitigation from the vendor CISA ICSA-20-196-03 · 3 productsThe risk for remote code execution and unauthenticated firmware installation can be mitigated by ensuring encryption and authentication between the user and the device, e.g.'by VPN.
Mitigation from the vendor CISA ICSA-20-196-03 · 3 productsUsing a modern and up to date browser while accessing the web application might reduce the risk of Cross-Site-Scripting attacks.

Advisories and patches

cert-portal.siemens.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.15.5read 2026-10-23
NVDCVSS 2.02.1read 2026-10-23
CNAweakness (CWE)CWE-916read 2026-10-23
NVDweakness (CWE)CWE-916read 2026-10-23
FIRST EPSSEPSS score0.2 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Published: 2020-07-14
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2020-10040?

Is CVE-2020-10040 actively exploited?

Active exploitation of CVE-2020-10040 has not been confirmed. Its EPSS score was 0.2% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-10040?

CVE-2020-10040 has a CVSS v3 base score of 5.5 (MEDIUM severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Running SICAM MMU (All versions < V2.05)? Hear about its next vulnerability

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