Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

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.

D-Link DIR-822A是中国D-Link公司的一款无线路由器。 D-Link DIR-822A A_101版本存在缓冲区错误漏洞，该漏洞源于L2TP Control Message Parser组件的tunnel_set_params函数存在越界写入，攻击者可远程发起攻击。

CVSS 9.9 · Critical EPSS 0.51% · P43

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
D-Link DIR-822A A_101 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-86510

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

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
Vulnerability Title
D-Link DIR-822A 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
D-Link DIR-822A是中国D-Link公司的一款无线路由器。 D-Link DIR-822A A_101版本存在缓冲区错误漏洞，该漏洞源于L2TP Control Message Parser组件的tunnel_set_params函数存在越界写入，攻击者可远程发起攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-86510

请登录查看更多情报信息。

Proof of Concept for CVE-2026-86510 (1)

Vendor Pages 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