CVE-2017-12734

CVE-2017-12734 is a high-severity vulnerability in Siemens Logo!8 Bm Fs-05 Firmware with a CVSS 3.x base score of 7.5. 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-895.

Key facts

Description

A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V1.81.2). An attacker with network access to the integrated web server on port 80/tcp could obtain the session ID of an active user session. A user must be logged in to the web interface. Siemens recommends to use the integrated webserver on port 80/tcp only in trusted networks.

Frequently asked questions

What is CVE-2017-12734?
A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V1.81.2). An attacker with network access to the integrated web server on port 80/tcp could obtain the session ID of an active user session. A user must be logged in to the web interface. Siemens recommends to use the integrated webserver on port 80/tcp only in trusted networks.
How severe is CVE-2017-12734?
CVE-2017-12734 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2017-12734 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-12734?
CVE-2017-12734 affects Siemens Logo!8 Bm Fs-05 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-12734?
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-2017-12734 published?
CVE-2017-12734 was published on 2017-08-30 and last updated on 2026-06-17.

References

Affected products (1)

More vulnerabilities in Siemens Logo!8 Bm Fs-05 Firmware

All CVEs affecting Siemens Logo!8 Bm Fs-05 Firmware →