What is CVE-2018-18636?

CVE-2018-18636 is a medium-severity vulnerability in D-Link Dsl-2640t Firmware, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-10-24.

How severe is CVE-2018-18636?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in D-Link Dsl-2640t Firmware

CVE-2018-18636

XSS exists in cgi-bin/webcm on D-link DSL-2640T routers via the var:RelaodHref or var:conid parameter.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-10-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.013 (69.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 70th percentile — 69.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

packetstormsecurity.com/files/149785/D-Link-DSL-2640T-Cross-Site-Scripting.html (Exploit, VDB Entry, Third Party Advisory)
cxsecurity.com/issue/WLB-2018100107 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-18636?: CVE-2018-18636 is a medium-severity vulnerability in D-Link Dsl-2640t Firmware, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-10-24.
How severe is CVE-2018-18636?: Medium severity. CVSS v3 base score is 6.1 out of 10.