How severe is CVE-2018-15839?

CVE-2018-15839 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-2018-15839 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 45% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-15839?

CVE-2018-15839 affects Dlink Dir-615 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-15839?

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-2018-15839 published?

CVE-2018-15839 was published on 2018-08-28 and last updated on 2026-06-17.

CVE-2018-15839

CVE-2018-15839 is a critical-severity vulnerability in Dlink Dir-615 Firmware with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 45% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 45% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Dlink Dir-615 Firmware
Published: 2018-08-28
Last modified: 2026-06-17

Description

D-Link DIR-615 devices have a buffer overflow via a long Authorization HTTP header.

Frequently asked questions

What is CVE-2018-15839?: D-Link DIR-615 devices have a buffer overflow via a long Authorization HTTP header.
How severe is CVE-2018-15839?: CVE-2018-15839 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-2018-15839 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 45% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-15839?: CVE-2018-15839 affects Dlink Dir-615 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-15839?: 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-2018-15839 published?: CVE-2018-15839 was published on 2018-08-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:dlink:dir-615_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Dlink Dir-615 Firmware

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CVE-2019-16920 — Critical (CVSS 9.8): Unauthenticated remote code execution occurs in D-Link products such as DIR-655C, DIR-866L, DIR-652, and DHP-1565. The…
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