CVE-2018-25120: D-Link DNS-343 ShareCenter devices running firmware versions up to and including 1.05 contain a command inject

Q: How do I fix CVE-2018-25120?

dns-343 firmware: upgrade to newer than 1.0.5. Exact commands for each OS are on this page.

Q: Is CVE-2018-25120 being exploited?

CVE-2018-25120 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-25120 affect?

CVE-2018-25120 affects dns-343 firmware. Severity is critical (CVSS 9.8). D-Link DNS-343 ShareCenter devices running firmware versions up to and including 1.05 contain a command injection vulnerability in the Mail Test functionality. The web maintenance script posts to the internal goForm endpoint '/goform/Mail_T

Q: How urgent is CVE-2018-25120?

Priority 71/100. Critical severity; EPSS top 4%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2018-25120 is a critical-severity flaw (CVSS 9.8) affecting dns-343 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

D-Link DNS-343 ShareCenter devices running firmware versions up to and including 1.05 contain a command injection vulnerability in the Mail Test functionality. The web maintenance script posts to the internal goForm endpoint '/goform/Mail_Test' and uses several form parameters directly in a call to a system email utility without proper input validation. An unauthenticated remote attacker can supply crafted form data that injects shell commands, r

Why this priority

Critical severity
EPSS top 4%: very likely to be exploited
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	9.8% (top 4%)
CISA exploited list	No
Weakness	CWE-78
Published	2025-10-29
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: dlink

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

Am I affected?

Timeline

2025-10-29 19:15 UTCPublished CVE record published
2026-06-17 01:54 UTCUpdated Record last modified

dlink dns-343 firmware UPGRADE

Affected: <= 1.0.5

Fixed in: newer than 1.0.5

Safe to downgrade to: no unaffected older release

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.

Exact fixes by distribution

Fedora ELN · openldap · FIXED · 2.6.16-1.eln159 · FEDORA-2026-4b30c86326 · source

sudo dnf upgrade --advisory=FEDORA-2026-4b30c86326

Fedora 46 · php-pecl-yac · FIXED · 3.0.1-2.fc46 · FEDORA-2026-5f43289aa2 · source

sudo dnf upgrade --advisory=FEDORA-2026-5f43289aa2

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/jamesbercegay/advisories/blob/master/%5BGTSA-00128%5D%20D-Link%20DNS-343%20Shar
Write-up: www.exploit-db.com/exploits/43845

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-2018-25120?

dns-343 firmware: upgrade to newer than 1.0.5. Exact commands for each OS are on this page.

Is CVE-2018-25120 being exploited?

CVE-2018-25120 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-2018-25120 affect?

CVE-2018-25120 affects dns-343 firmware. Severity is critical (CVSS 9.8). D-Link DNS-343 ShareCenter devices running firmware versions up to and including 1.05 contain a command injection vulnerability in the Mail Test functionality. The web maintenance script posts to the internal goForm endpoint '/goform/Mail_T

How urgent is CVE-2018-25120?

Priority 71/100. Critical severity; EPSS top 4%: very likely to be exploited; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

D-Link vulnerabilities

Related CVEs

CVE-2024-8134 MEDIUM 6.3 MITIGATE MITIGATE A vulnerability was found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-32
CVE-2024-8133 MEDIUM 6.3 MITIGATE MITIGATE A vulnerability was found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-32
CVE-2024-8132 MEDIUM 6.3 MITIGATE MITIGATE A vulnerability was found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-32
CVE-2024-8131 MEDIUM 6.3 MITIGATE MITIGATE A vulnerability was found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-32
CVE-2024-8130 MEDIUM 6.3 MITIGATE MITIGATE A vulnerability has been found in D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, D

References

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