CVE-2018-8941: Diagnostics functionality on D-Link DSL-3782 devices with firmware EU v

This month

HIGH 8.8MITIGATE

CVE-2018-8941 is a high-severity flaw (CVSS 8.8) affecting dsl-3782 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Diagnostics functionality on D-Link DSL-3782 devices with firmware EU v. 1.01 has a buffer overflow, allowing authenticated remote attackers to execute arbitrary code via a long Addr value to the 'set Diagnostics_Entry' function in an HTTP request, related to /userfs/bin/tcapi.

Why this priority

High severity
EPSS top 6%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	6.7% (top 6%)
CISA exploited list	No
Weakness	CWE-119
Published	2018-04-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: d-link

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-04-03 23:29 UTCPublished CVE record published
2026-06-17 02:05 UTCUpdated Record last modified

d-link dsl-3782 firmware MITIGATE

Affected: 1.01

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.01

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-8941?

dsl-3782 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-8941 being exploited?

CVE-2018-8941 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-8941 affect?

CVE-2018-8941 affects dsl-3782 firmware. Severity is high (CVSS 8.8). Diagnostics functionality on D-Link DSL-3782 devices with firmware EU v. 1.01 has a buffer overflow, allowing authenticated remote attackers to execute arbitrary code via a long Addr value to the 'set Diagnostics_Entry' function in an HTTP

How urgent is CVE-2018-8941?

Priority 59/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference

Software pages

D-Link vulnerabilities

Related CVEs

CVE-2023-27216 HIGH 8.8 MITIGATE An issue found in D-Link DSL-3782 v.1.03 allows remote authenticated users to execute arbitrary code as root v
CVE-2022-35192 HIGH 7.5 MITIGATE D-Link Wireless AC1200 Dual Band VDSL ADSL Modem Router DSL-3782 Firmware v1.01 allows unauthenticated attacke
CVE-2022-35191 MEDIUM 6.5 MITIGATE D-Link Wireless AC1200 Dual Band VDSL ADSL Modem Router DSL-3782 Firmware v1.01 allows unauthenticated attacke
CVE-2025-25896 MEDIUM 5.7 MITIGATE A buffer overflow vulnerability was discovered in D-Link DSL-3782 v1.01 via the destination, netmask, and gate
CVE-2025-25895 HIGH 8.0 MITIGATE An OS command injection vulnerability was discovered in D-Link DSL-3782 v1.01 via the public_type parameter

References

← Back to latest CVEs