A vulnerability has been identified in SICAM MMU (All versions < V2.05), SICAM SGU (All versions), SICAM T (All versions < V2.18).

published 2020-07-14 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-2504

cvss: 8.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits: 0; none known

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.

Patch / fix

fixed in 2

siemens sicam_mmu_firmware 2.05
siemens sicam_t_firmware 2.18

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-20-196-03 updated 2020-07-14 cvss 7.5

Siemens SICAM MMU, SICAM T, and SICAM SGU

Siemens SICAM MMU <V2.05
affected: fixed in V2.05, mitigation
Siemens SICAM SGU
affected: mitigation
Siemens SICAM T <V2.18
affected: fixed in V2.18, mitigation

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

Siemens AG SICAM MMU
Siemens AG SICAM SGU
Siemens AG SICAM T

Classification

Weakness

CWE-311 Missing Encryption of Sensitive Data

References

cert-portal.siemens.com /productcert/pdf/ssa-305120.pdf
vendor-advisory

Sources

CVE List CVE-2020-10039
NVD CVE-2020-10039

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary