How severe is CVE-2017-14429?

CVE-2017-14429 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-14429 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-14429?

CVE-2017-14429 primarily affects Dlink Dir-850l Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-14429?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2017-14429 published?

CVE-2017-14429 was published on 2017-09-13 and last updated on 2026-06-17.

CVE-2017-14429

CVE-2017-14429 is a critical-severity vulnerability in Dlink Dir-850l Firmware with a CVSS 3.x base score of 9.8. 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Dlink Dir-850l Firmware
Published: 2017-09-13
Last modified: 2026-06-17

Description

The DHCP client on D-Link DIR-850L REV. A (with firmware through FW114WWb07_h2ab_beta1) and REV. B (with firmware through FW208WWb02) devices allows unauthenticated remote code execution as root because /etc/services/INET/inet_ipv4.php mishandles shell metacharacters, affecting generated files such as WAN-1-udhcpc.sh.

Frequently asked questions

What is CVE-2017-14429?: The DHCP client on D-Link DIR-850L REV. A (with firmware through FW114WWb07_h2ab_beta1) and REV. B (with firmware through FW208WWb02) devices allows unauthenticated remote code execution as root because /etc/services/INET/inet_ipv4.php mishandles shell metacharacters, affecting generated files such as WAN-1-udhcpc.sh.
How severe is CVE-2017-14429?: CVE-2017-14429 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-14429 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-14429?: CVE-2017-14429 primarily affects Dlink Dir-850l Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-14429?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2017-14429 published?: CVE-2017-14429 was published on 2017-09-13 and last updated on 2026-06-17.

References

https://pierrekim.github.io/blog/2017-09-08-dlink-850l-mydlink-cloud-0days-vulnerabilities.html

Affected products (2)

cpe:2.3:o:dlink:dir-850l_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dir-850l_firmware:fw114wwb07_h2ab:beta1:*:*:*:*:*:*

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CVE-2018-20675 — Critical (CVSS 9.8): D-Link DIR-822 C1 before v3.11B01Beta, DIR-822-US C1 before v3.11B01Beta, DIR-850L A* before v1.21B08Beta, DIR-850L B*…
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CVE-2018-9032 — Critical (CVSS 9.8): An authentication bypass vulnerability on D-Link DIR-850L Wireless AC1200 Dual Band Gigabit Cloud Router (Hardware…
CVE-2017-14421 — Critical (CVSS 9.8): D-Link DIR-850L REV. B (with firmware through FW208WWb02) devices have a hardcoded password of…
CVE-2017-14417 — Critical (CVSS 9.8): register_send.php on D-Link DIR-850L REV. B (with firmware through FW208WWb02) devices does not require authentication,…

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