What is CVE-2018-10996?

CVE-2018-10996 is a critical-severity vulnerability in D-Link Dir-629-B, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2018-05-12.

How severe is CVE-2018-10996?

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

Buffer overflow in D-Link Dir-629-B

CVE-2018-10996

The weblogin_log function in /htdocs/cgibin on D-Link DIR-629-B1 devices allows attackers to execute arbitrary code or cause a denial of service (buffer overflow) via a session.cgi?ACTION=logout request involving a long REMOTE_ADDR environment variable.

Vulnerability class: Buffer Overflow

Published 2018-05-12 · 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: 0.051 (92.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.053 · newest: 0.051 · change: -0.002

Affected products

Weakness classification (CWE)

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

References

www.securityfocus.com/bid/104277 (VDB Entry, Third Party Advisory, vdb-entry)
github.com/kgsdy/D-Link-DIR-629/blob/master/D-Link-DIR-629-B1.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-10996?: CVE-2018-10996 is a critical-severity vulnerability in D-Link Dir-629-B, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2018-05-12.
How severe is CVE-2018-10996?: Critical severity. CVSS v3 base score is 9.8 out of 10.