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CVE-2026-86510— D-Link DIR-822A L2TP Control Message tunnel_set_params out-of-bounds write

Quick assessment

Affected
D-Link DIR-822A
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 D-Link DIR-822A（固件版本 A_101）中发现了一个漏洞。该漏洞影响的是组件“L2TP 控制消息解析器”中的 函数。攻击者通过操纵相关参数，可引发越界写（out-of-bounds write）。该攻击可远程发起。漏洞的利用方式已公开，可能会被实际利用。

CVSS 9.9 · Critical

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-86510

Vulnerability Information
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Vulnerability Title
D-Link DIR-822A L2TP Control Message tunnel_set_params out-of-bounds write
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
D-Link DIR-822A A_101 cpe:2.3:h:d-link:dir-822a:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-86510

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III. Intelligence Information for CVE-2026-86510

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Vendor Pages for CVE-2026-86510 (1)

Other References for CVE-2026-86510 (1)

Other References for CVE-2026-86510 (1)

IV. Related Vulnerabilities

Same product: DIR-822A
Same vendor: D-Link
Same weakness: CWE-787

V. Comments for CVE-2026-86510

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