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CVE-2018-3948

35
FAUCET Score

CVE-2018-3948 is a denial-of-service vulnerability affecting the URI-parsing functionality of the TP-Link TL-R600VPN HTTP server. A specially crafted URL can cause the server to become unresponsive, leading to downtime for the management portal. This vulnerability has a CVSS score of 7.5 (HIGH), indicating it can be exploited remotely with low complexity and without authentication, resulting in high availability impact. While there is no evidence of active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), it has garnered some community discussion and media coverage, suggesting awareness within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
1.3.0CPE matchmatch criteria
cpe:2.3:o:tp-link:tl-r600vpn_firmware:1.3.0:*:*:*:*:*:*:*
1.2.3CPE matchmatch criteria
cpe:2.3:o:tp-link:tl-r600vpn_firmware:1.2.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
23.06%
Probability of exploitation in next 30 days
EPSS Percentile
97.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.2306 is in the 96th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

talosintelligence.com / vulnerability_reports/TALOS-2018-0617
ExploitThird Party Advisory