CVE-2026-2055
Published: 06 February 2026
Summary
CVE-2026-2055 is a medium-severity Exposure of Sensitive Information to an Unauthorized Actor (CWE-200) vulnerability in Dlink Dir-605L Firmware. Its CVSS base score is 5.5 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 28.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 AC-3 (Access Enforcement) and SC-7 (Boundary Protection).
Deeper analysis
CVE-2026-2055 is an information disclosure vulnerability affecting D-Link DIR-605L and DIR-619L routers running firmware versions 2.06B01 and 2.13B01. The issue resides in an unknown function within the DHCP Client Information Handler component, which can be manipulated to leak sensitive data. Assigned a CVSS v3.1 base score of 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N), it maps to CWE-200 (Exposure of Sensitive Information), CWE-284 (Improper Access Control), and NVD-CWE-Other. This flaw impacts only products that are no longer supported by the vendor.
The vulnerability enables remote exploitation over the network with low complexity and no authentication or user interaction required. Attackers can trigger the disclosure without privileges, achieving low-impact confidentiality loss while leaving integrity and availability unaffected. A proof-of-concept exploit is publicly available, facilitating potential attacks against exposed instances.
VulDB advisories and referenced GitHub repositories detail the issue but note no patches or mitigations from the vendor, as the affected products are end-of-life and unsupported. Security practitioners should prioritize network segmentation, firewall rules to block unauthorized DHCP interactions, or device replacement to mitigate exposure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-5662
Vulnerability details
A weakness has been identified in D-Link DIR-605L and DIR-619L 2.06B01/2.13B01. The affected element is an unknown function of the component DHCP Client Information Handler. Executing a manipulation can lead to information disclosure. The attack may be launched remotely. The…
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exploit has been made available to the public and could be used for attacks. This vulnerability only affects products that are no longer supported by the maintainer.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Remote unauthenticated info disclosure in public-facing DHCP handler directly enables exploitation of exposed network devices.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Enforces access restrictions on the DHCP Client Information Handler so that unauthenticated remote actors cannot trigger the information disclosure.
Boundary-protection mechanisms (firewalls, segmentation) block unauthorized network access to the vulnerable DHCP component on unsupported D-Link devices.
Requires replacement or approved mitigations for the explicitly unsupported DIR-605L/DIR-619L firmware versions that contain the flaw.