CVE-2017-9946Apogee Pxc Firmware Authentication Bypass
An attacker with network access to the integrated web server (80/tcp and 443/tcp) could bypass the authentication and download sensitive information from the device.
Published Oct 23, 2017 · Updated Jun 2, 2026
Key Facts
Patch immediately- CVE-2017-9946 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting Apogee Pxc Firmware (Siemens), Apogee Pxc Modular Firmware (Siemens), Talon Tc Compact Firmware (Siemens) and 2 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 25% probability of exploitation in the next 30 days.
- Fixed versions are available, including Apogee Pxc Firmware 3.5, Apogee Pxc Modular Firmware 3.5, Talon Tc Compact Firmware 3.5.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
25%
Higher than 97.8% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
38/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
Description
A vulnerability has been identified in Siemens APOGEE PXC and TALON TC BACnet Automation Controllers in all versions <V3.5. An attacker with network access to the integrated web server (80/tcp and 443/tcp) could bypass the authentication and download sensitive information from the device.
Affected Products
5 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Apogee Pxc FirmwareSiemens | See advisory | 3.5 |
| Apogee Pxc Modular FirmwareSiemens | See advisory | 3.5 |
| Talon Tc Compact FirmwareSiemens | See advisory | 3.5 |
| Talon Tc Modular FirmwareSiemens | See advisory | 3.5 |
| APOGEE PXC and TALON TC BACnet Automation Controllers All versions <V3.5 | >= APOGEE PXC and TALON TC BACnet Automation Controllers All versions <V3.5 | n/a |
Patched Releases
Apogee Pxc Firmware
3.5
Apogee Pxc Modular Firmware
3.5
Talon Tc Compact Firmware
3.5
Talon Tc Modular Firmware
3.5
Timeline
Publicly disclosed
Oct 23, 2017
Last updated
Jun 2, 2026
Weakness Type
- CWE-287 Improper Authentication
FAQ
Common Questions.
A vulnerability has been identified in Siemens APOGEE PXC and TALON TC BACnet Automation Controllers in all versions <V3.5.
Affected: Apogee Pxc Firmware (Siemens); Apogee Pxc Modular Firmware (Siemens); Talon Tc Compact Firmware (Siemens), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Apogee Pxc Firmware 3.5, Apogee Pxc Modular Firmware 3.5, Talon Tc Compact Firmware 3.5.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
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