How severe is CVE-2019-9744?

CVE-2019-9744 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-9744 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-9744?

CVE-2019-9744 primarily affects Phoenixcontact Fl Nat Smn 8tx-m-dmg Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-9744?

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-2019-9744 published?

CVE-2019-9744 was published on 2019-03-26 and last updated on 2026-06-17.

CVE-2019-9744

CVE-2019-9744 is a high-severity vulnerability in Phoenixcontact Fl Nat Smn 8tx-m-dmg Firmware with a CVSS 3.x base score of 8.8. 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-384.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-384
Affected product: Phoenixcontact Fl Nat Smn 8tx-m-dmg Firmware
Published: 2019-03-26
Last modified: 2026-06-17

Description

An issue was discovered on PHOENIX CONTACT FL NAT SMCS 8TX, FL NAT SMN 8TX, FL NAT SMN 8TX-M, and FL NAT SMN 8TX-M-DMG devices. There is unauthorized access to the WEB-UI by attackers arriving from the same source IP address as an authenticated user, because this IP address is used as a session identifier.

Frequently asked questions

What is CVE-2019-9744?: An issue was discovered on PHOENIX CONTACT FL NAT SMCS 8TX, FL NAT SMN 8TX, FL NAT SMN 8TX-M, and FL NAT SMN 8TX-M-DMG devices. There is unauthorized access to the WEB-UI by attackers arriving from the same source IP address as an authenticated user, because this IP address is used as a session identifier.
How severe is CVE-2019-9744?: CVE-2019-9744 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-9744 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-9744?: CVE-2019-9744 primarily affects Phoenixcontact Fl Nat Smn 8tx-m-dmg Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-9744?: 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-2019-9744 published?: CVE-2019-9744 was published on 2019-03-26 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:o:phoenixcontact:fl_nat_smn_8tx-m-dmg_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:phoenixcontact:fl_nat_smn_8tx-m_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:phoenixcontact:fl_nat_smn_8tx_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:phoenixcontact:fl_nat_smcs_8tx_firmware:-:*:*:*:*:*:*:*

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