CVE-2026-86510
Received Received - Intake

Out-of-Bounds Write in D-Link DIR-822A A_101 L2TP Parser

Vulnerability report for CVE-2026-86510, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-09-08

Last updated on: 2026-09-08

Assigner: VulDB

Description

A vulnerability has been found in D-Link DIR-822A A_101. Affected is the function tunnel_set_params of the component L2TP Control Message Parser. Such manipulation leads to out-of-bounds write. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

CVSS Scores

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Meta Information

Published
2026-09-08
Last Modified
2026-09-08
Generated
2026-09-08
AI Q&A
2026-09-08
EPSS Evaluated
N/A
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
d-link dir-822a a_101

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.

Attack-Flow Graph

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Executive Summary

This vulnerability is an out-of-bounds write flaw in the L2TP Control Message Parser function tunnel_set_params of D-Link DIR-822A A_101. It allows remote attackers to execute arbitrary code by manipulating network traffic, potentially leading to system compromise.

Detection Guidance

This vulnerability involves an out-of-bounds write in the L2TP Control Message Parser of D-Link DIR-822A A_101 firmware. Detection requires checking for affected firmware versions and monitoring network traffic for malformed L2TP control messages. No specific commands are provided in the context.

Impact Analysis

An attacker could exploit this to gain control over your router, intercept network traffic, or launch further attacks on your network. This may result in data theft, unauthorized access, or disruption of network services.

Compliance Impact

The vulnerability allows remote attackers to execute arbitrary code or cause a denial of service via an out-of-bounds write in the L2TP Control Message Parser. This could lead to unauthorized access, data breaches, or service disruption, which may violate compliance requirements under GDPR (data protection) and HIPAA (healthcare data security).

Mitigation Strategies

Immediately update the D-Link DIR-822A firmware to the latest version. Disable L2TP services if not in use. Restrict network access to the device via firewall rules. Monitor network traffic for unusual activity targeting the L2TP Control Message Parser.

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