How severe is CVE-2018-18009?

CVE-2018-18009 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-2018-18009 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18009?

CVE-2018-18009 primarily affects Dlink Dir-140l 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-2018-18009?

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-2018-18009 published?

CVE-2018-18009 was published on 2018-12-21 and last updated on 2026-06-17.

CVE-2018-18009

CVE-2018-18009 is a critical-severity vulnerability in Dlink Dir-140l 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-798.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 5.0
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Dlink Dir-140l Firmware
Published: 2018-12-21
Last modified: 2026-06-17

Description

dirary0.js on D-Link DIR-140L, DIR-640L devices allows remote unauthenticated attackers to discover admin credentials.

Frequently asked questions

What is CVE-2018-18009?: dirary0.js on D-Link DIR-140L, DIR-640L devices allows remote unauthenticated attackers to discover admin credentials.
How severe is CVE-2018-18009?: CVE-2018-18009 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-2018-18009 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18009?: CVE-2018-18009 primarily affects Dlink Dir-140l 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-2018-18009?: 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-2018-18009 published?: CVE-2018-18009 was published on 2018-12-21 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:dlink:dir-140l_firmware:1.02:*:*:*:*:*:*:*
cpe:2.3:o:dlink:dir-640l_firmware:1.01ru:*:*:*:*:*:*:*

More vulnerabilities in Dlink Dir-140l Firmware

CVE-2018-18008 — Critical (CVSS 9.8): spaces.htm on multiple D-Link devices (DSL, DIR, DWR) allows remote unauthenticated attackers to discover admin…
CVE-2018-10824 — Critical (CVSS 9.8): An issue was discovered on D-Link DWR-116 through 1.06, DIR-140L through 1.02, DIR-640L through 1.02, DWR-512 through…
CVE-2018-10822 — High (CVSS 7.5): Directory traversal vulnerability in the web interface on D-Link DWR-116 through 1.06, DIR-140L through 1.02, DIR-640L…

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