CVE-2017-16743
An Improper Authorization issue was discovered in PHOENIX CONTACT FL SWITCH 3xxx, 4xxx, and 48xxx...
An Improper Authorization issue was discovered in PHOENIX CONTACT FL SWITCH 3xxx, 4xxx, and 48xxx Series products running firmware Version 1.0 to 1.32. A remote unauthenticated attacker may be able to craft special HTTP requests allowing an attacker to bypass web-service authentication allowing the attacker to obtain administrative privileges on the device.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An Improper Authorization issue was discovered in PHOENIX CONTACT FL SWITCH 3xxx, 4xxx, and 48xxx Series products running firmware Version 1.0 to 1.32. A remote unauthenticated attacker may be able to craft special HTTP requests allowing an attacker to bypass web-service authentication allowing the attacker to obtain administrative privileges on the device.
- Record
CVE-2017-16743- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-285, CWE-863
- Updated
- 2026-11-02
CVE List No score
An Improper Authorization issue was discovered in PHOENIX CONTACT FL SWITCH 3xxx, 4xxx, and 48xxx Series products running firmware Version 1.0 to 1.32. A remote unauthenticated attacker may be able to craft special HTTP requests allowing an attacker to bypass web-service authentication allowing the attacker to obtain administrative privileges on the device.
- Record
CVE-2017-16743- Weakness
- CWE-285
- Updated
- 2026-11-02
EUVDEUVD-2017-7927 No score
An Improper Authorization issue was discovered in PHOENIX CONTACT FL SWITCH 3xxx, 4xxx, and 48xxx Series products running firmware Version 1.0 to 1.32. A remote unauthenticated attacker may be able to craft special HTTP requests allowing an attacker to bypass web-service authentication allowing the attacker to obtain administrative privileges on the device.
- Record
EUVD-2017-7927- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-xp4q-qhv3-758q
An Improper Authorization issue was discovered in PHOENIX CONTACT FL SWITCH 3xxx, 4xxx, and 48xxx...
An Improper Authorization issue was discovered in PHOENIX CONTACT FL SWITCH 3xxx, 4xxx, and 48xxx Series products running firmware Version 1.0 to 1.32. A remote unauthenticated attacker may be able to craft special HTTP requests allowing an attacker to bypass web-service authentication allowing the attacker to obtain administrative privileges on the device.
- Record
GHSA-xp4q-qhv3-758q- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-863
- Updated
- 2026-11-02
Affected products
- phoenixcontact fl switch 3004t-fx firmware
- phoenixcontact fl switch 3004t-fx st firmware
- phoenixcontact fl switch 3005 firmware
- phoenixcontact fl switch 3005t firmware
- phoenixcontact fl switch 3006t-2fx firmware
- phoenixcontact fl switch 3006t-2fx sm firmware
- phoenixcontact fl switch 3006t-2fx st firmware
- phoenixcontact fl switch 3008 firmware
- phoenixcontact fl switch 3008t firmware
- phoenixcontact fl switch 3012e-2fx sm firmware
- phoenixcontact fl switch 3012e-2sfx firmware
- phoenixcontact fl switch 3016 firmware
Show 17 moreShow less
- phoenixcontact fl switch 3016e firmware
- phoenixcontact fl switch 3016t firmware
- phoenixcontact fl switch 4000t-8poe-2sfp-r firmware
- phoenixcontact fl switch 4008t-2gt-3fx sm firmware
- phoenixcontact fl switch 4008t-2gt-4fx sm firmware
- phoenixcontact fl switch 4008t-2sfp firmware
- phoenixcontact fl switch 4012t-2gt-2fx st firmware
- phoenixcontact fl switch 4012t 2gt 2fx firmware
- phoenixcontact fl switch 4800e-24fx-4gc firmware
- phoenixcontact fl switch 4800e-24fx sm-4gc firmware
- phoenixcontact fl switch 4808e-16fx-4gc firmware
- phoenixcontact fl switch 4808e-16fx lc-4gc firmware
- phoenixcontact fl switch 4808e-16fx sm-4gc firmware
- phoenixcontact fl switch 4808e-16fx sm lc-4gc firmware
- phoenixcontact fl switch 4808e-16fx sm st-4gc firmware
- phoenixcontact fl switch 4808e-16fx st-4gc firmware
- phoenixcontact fl switch 4824e-4gc firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2017-16743 is a critical vulnerability (CVSS 9.8) in Phoenixcontact Fl Switch 3004t-fx Firmware, published January 12, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.11%, the 87th percentile. No source names a fixed version.