What is CVE-2018-15839?

CVE-2018-15839 is a critical-severity vulnerability in Dlink Dir-615, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2018-08-28.

How severe is CVE-2018-15839?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2018-15839 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Dlink Dir-615

CVE-2018-15839

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

Vulnerability class: Buffer Overflow

Published 2018-08-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.453 (98.8th percentile), scored 2026-10-17.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.453 · newest: 0.453 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

References

hackingvila.wordpress.com/2018/08/24/d-link-dir-615-buffer-overflow-via-a-long-… (Permissions Required, Third Party Advisory)
www.exploit-db.com/exploits/45317/ (VDB Entry, Third Party Advisory, exploit)

Frequently asked questions

What is CVE-2018-15839?: CVE-2018-15839 is a critical-severity vulnerability in Dlink Dir-615, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2018-08-28.
How severe is CVE-2018-15839?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2018-15839 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.