CVE-2018-3948

Name: CVE-2018-3948
Creator: NVD / NIST
Published: 2018-11-30T17:29:00.41+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 23.06%

Last modified Jun 17, 2026

CVE-2018-3948 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An exploitable denial-of-service vulnerability exists in the URI-parsing functionality of the TP-Link TL-R600VPN HTTP server. A specially crafted URL can cause the server to stop responding to requests, resulting in downtime for the management portal. EPSS estimates a 23.06% chance of exploitation in the next 30 days.

Description

An exploitable denial-of-service vulnerability exists in the URI-parsing functionality of the TP-Link TL-R600VPN HTTP server. A specially crafted URL can cause the server to stop responding to requests, resulting in downtime for the management portal. An attacker can send either an unauthenticated or authenticated web request to trigger this vulnerability.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

23.06%

97.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Tp-Link	Tl-R600vpn Firmware	1.3.0
Tp-Link	Tl-R600vpn Firmware	1.2.3

References

https://talosintelligence.com/vulnerability_reports/TALOS-2018-0617Exploit, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2018-0617Exploit, Third Party Advisory

Timeline

Published: Nov 30, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-3948?

How severe is CVE-2018-3948?

CVE-2018-3948 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 23.06% probability of exploitation in the next 30 days.

How do I fix CVE-2018-3948?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-3948?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST