What is CVE-2014-7858?

CVE-2014-7858 is a critical-severity vulnerability in D-Link Dnr-326 Firmware, classified under Improper Authentication. CVSS score: 9.8/10. Published 2017-08-25.

How severe is CVE-2014-7858?

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

Auth bypass in D-Link Dnr-326 Firmware

CVE-2014-7858

The check_login function in D-Link DNR-326 before 2.10 build 03 allows remote attackers to bypass authentication and log in by setting the username cookie parameter to an arbitrary string.

Vulnerability class: Broken Authentication

Published 2017-08-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.152 (96.6th percentile), scored 2026-09-29.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.152 · newest: 0.152 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

packetstormsecurity.com/files/132075/D-Link-Bypass-Buffer-Overflow.html (VDB Entry, Third Party Advisory)
www.securityfocus.com/archive/1/535626/100/200/threaded (mailing-list)
www.securityfocus.com/bid/74886 (VDB Entry, Third Party Advisory, vdb-entry)
seclists.org/fulldisclosure/2015/May/125 (mailing-list, Mailing List, VDB Entry, Third Party Advisory)
www.search-lab.hu/media/D-Link_Security_advisory_3_0_public.pdf (Technical Description)

Frequently asked questions

What is CVE-2014-7858?: CVE-2014-7858 is a critical-severity vulnerability in D-Link Dnr-326 Firmware, classified under Improper Authentication. CVSS score: 9.8/10. Published 2017-08-25.
How severe is CVE-2014-7858?: Critical severity. CVSS v3 base score is 9.8 out of 10.