A vulnerability has been identified in Siemens APOGEE PXC and TALON TC BACnet Automation Controllers in all versions <V3.5.

Published 9 y ago 2017-10-23 · modified 4 mo ago 2026-06-17 · JSON

CVSS

5.3

v3.1 · CNA

CISA KEV

not known exploited

EPSS

8.2%

percentile 95%

Public exploits

none known

A vulnerability has been identified in Siemens APOGEE PXC and TALON TC BACnet Automation Controllers in all versions <V3.5. A directory traversal vulnerability could allow a remote attacker with network access to the integrated web server (80/tcp and 443/tcp) to obtain information on the structure of the file system of the affected devices.

CISA SSVC assessment

Exploitation: Proof of concept public
Automatable: yes
Technical impact: partial
Assessed: 5 mo ago 2026-06-02

Exploit prediction (EPSS)

8.19% probability of exploitation in the next 30 days, higher than 95% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
CISA ADP	3.1	5.3	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`
NVD	3.1	5.3	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`
CNA	3.1	5.3	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`
NVD	2.0	5.0	`AV:N/AC:L/Au:N/C:P/I:N/A:N`

Affected products

n/a APOGEE PXC and TALON TC BACnet Automation Controllers All versions <V3.5

Classification

Weakness

CWE-538 Insertion of Sensitive Information into Externally-Accessible File or Directory
CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

securityfocus.com /bid/101248 · vdb-entry, x_transferred
siemens.com /cert/pool/cert/siemens_security_advisory_ssa-148078.pdf · x_transferred
cert-portal.siemens.com /productcert/pdf/ssa-148078.pdf · x_transferred
packetstormsecurity.com /files/169544/Siemens-APOGEE-PXC-TALON-TC-Authentication-Bypass.html · x_transferred
packetstorm.news /files/id/169544 · exploit

Sources

CVE List: CVE-2017-9947
NVD: CVE-2017-9947

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.

Summary