CVE-2026-2855
Published: 20 February 2026
Summary
CVE-2026-2855 is a high-severity Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119) vulnerability in Dlink Dwr-M960 Firmware. Its CVSS base score is 7.4 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 45.0th 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 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Deeper analysis
CVE-2026-2855 is a stack-based buffer overflow vulnerability in the D-Link DWR-M960 router running firmware version 1.01.07. The issue resides in the DDNS Settings Handler component, specifically the function sub_4648F0 within the /boafrm/formDdns file. It is triggered by manipulating the "submit-url" argument, as identified under CWEs-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-121 (Stack-based Buffer Overflow). The vulnerability carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating high severity due to its potential for significant impact.
The vulnerability can be exploited remotely by an attacker with low privileges, such as an authenticated user on the device. Exploitation requires network access with low attack complexity and no user interaction. Successful manipulation leads to a stack-based buffer overflow, enabling high-impact confidentiality, integrity, and availability violations, potentially resulting in remote code execution, data compromise, or denial of service.
Advisories and details are available through references including VulDB entries (ctiid.347094, id.347094, submit.754458), a GitHub issue at LX-66-LX/cve-new/issues/12, and the D-Link website. These sources document the vulnerability and note that a public exploit has been disclosed, but specific patch or mitigation instructions are not detailed in the initial disclosure. Security practitioners should consult these for firmware updates or workarounds.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-8309
Vulnerability details
A vulnerability has been found in D-Link DWR-M960 1.01.07. Affected is the function sub_4648F0 of the file /boafrm/formDdns of the component DDNS Settings Handler. The manipulation of the argument submit-url leads to stack-based buffer overflow. The attack may be initiated…
more
remotely. The exploit has been disclosed to the public and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Stack buffer overflow in router web management interface (/boafrm/formDdns) allows remote authenticated low-priv RCE, directly mapping to exploitation of public-facing application (T1190) and post-auth privilege escalation to code execution (T1068).
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly enforces validation of the 'submit-url' argument to prevent the stack-based buffer overflow in the DDNS handler.
Implements memory protections like non-executable stacks and address space randomization to block exploitation of the buffer overflow.
Mandates timely firmware updates to patch the specific buffer overflow vulnerability in the D-Link router.