How severe is CVE-2017-12740?

CVE-2017-12740 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2017-12740 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-12740?

CVE-2017-12740 affects Siemens Logo! Soft Comfort. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-12740?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-12740 published?

CVE-2017-12740 was published on 2017-12-26 and last updated on 2026-06-17.

CVE-2017-12740

CVE-2017-12740 is a medium-severity vulnerability in Siemens Logo! Soft Comfort with a CVSS 3.x base score of 5.9. 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-345.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-345
Affected product: Siemens Logo! Soft Comfort
Published: 2017-12-26
Last modified: 2026-06-17

Description

Siemens LOGO! Soft Comfort (All versions before V8.2) lacks integrity verification of software packages downloaded via an unprotected communication channel. This could allow a remote attacker to manipulate the software package while performing a Man-in-the-Middle (MitM) attack.

Frequently asked questions

What is CVE-2017-12740?: Siemens LOGO! Soft Comfort (All versions before V8.2) lacks integrity verification of software packages downloaded via an unprotected communication channel. This could allow a remote attacker to manipulate the software package while performing a Man-in-the-Middle (MitM) attack.
How severe is CVE-2017-12740?: CVE-2017-12740 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2017-12740 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-12740?: CVE-2017-12740 affects Siemens Logo! Soft Comfort. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-12740?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-12740 published?: CVE-2017-12740 was published on 2017-12-26 and last updated on 2026-06-17.

References

https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-888929.pdf

Affected products (1)

cpe:2.3:a:siemens:logo\!_soft_comfort:*:*:*:*:*:*:*:*

More vulnerabilities in Siemens Logo! Soft Comfort

CVE-2021-44228 — Critical (CVSS 10.0): Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in…
CVE-2021-45046 — Critical (CVSS 9.0): It was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was incomplete in certain non-default…
CVE-2020-25244 — High (CVSS 8.4): A vulnerability has been identified in LOGO! Soft Comfort (All versions < V8.4). The software insecurely loads…
CVE-2019-10924 — High (CVSS 7.8): A vulnerability has been identified in LOGO! Soft Comfort (All versions < V8.3). The vulnerability could allow an…
CVE-2020-25231 — Medium (CVSS 5.5): A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V8.3), LOGO! Soft Comfort…
CVE-2020-25243 — Medium (CVSS 5.1): A vulnerability has been identified in LOGO! Soft Comfort (All versions < V8.4). A zip slip vulnerability could be…

All CVEs affecting Siemens Logo! Soft Comfort →

Other CWE-345 (Insufficient Verification of Data Authenticity) vulnerabilities

CVE-2026-35051 — Critical (CVSS 10.0): Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is an…
CVE-2014-8165 — Critical (CVSS 10.0): scripts/amsvis/powerpcAMS/amsnet.py in powerpc-utils-python uses the pickle Python module unsafely, which allows remote…
CVE-2026-50195 — Critical (CVSS 9.9): containerd is an open-source container runtime. Versions prior to 2.3.2, 2.2.5 and 2.1.9 contain a vulnerability in the…
CVE-2022-36130 — Critical (CVSS 9.9): HashiCorp Boundary up to 0.10.1 did not properly perform data integrity checks to ensure the resources were associated…
CVE-2026-50214 — Critical (CVSS 9.8): The /v1/Plan service relies entirely on a shared global API token for full administrative management, allowing…
CVE-2025-15385 — Critical (CVSS 9.8): Insufficient Verification of Data Authenticity vulnerability in TECNO Mobile com.Afmobi.Boomplayer allows…

Browse all CWE-345 (Insufficient Verification of Data Authenticity) vulnerabilities →