CVE-2025-2550Public exploit

Unauthenticated DDNS changes via formSetDDNS

Published Mar 20, 2025 · Updated Mar 20, 2025

Improper access control in D-Link DIR-618 and DIR-605L 2.02 and 3.02 allows remote attackers to alter DDNS settings from the local network. The published record identifies /goform/formSetDDNS but does not disclose the missing authorization check or crafted request parameters. No account or user interaction is required, but the attacker must reach the router from an adjacent network; the documented consequence is limited to configuration integrity.

CVSS severity5.3
Medium
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in D-Link DIR-618 and DIR-605L 2.02 and 3.02 allows remote attackers to alter DDNS settings from the local network. The published record identifies /goform/formSetDDNS but does not disclose the missing authorization check or crafted request parameters. No account or user interaction is required, but the attacker must reach the router from an adjacent network; the documented consequence is limited to configuration integrity.

The record

CVE
CVE-2025-2550
Published
Mar 20, 2025
Updated
Mar 20, 2025
Vendor
D-Link
Product
DIR-618
Classifications
CWE-266, CWE-284, T1565.001
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.02
  2. Affected versionversion=3.02

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

D-Link · DIR-618version=2.02; version=3.02
D-Link · DIR-605Lversion=2.02; version=3.02

Published CVSS scores

5.3VulDBCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
4.3VulDBCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
4.3VulDBCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.3VulDBAV:A/AC:L/Au:N/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-266Incorrect Privilege Assignment
CWE-284Improper Access Control
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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