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CVE-2026-86296— D-Link DIR-822A udhcpcd serverpacket.c strcpy stack-based overflow

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udhcpcd组件的serverpacket.c文件中strcpy函数使用不当，导致栈缓冲区溢出，攻击者可远程利用该漏洞。

CVSS 10.0 · Critical EPSS 1.70% · P77

Affected Version Matrix 1

VendorProduct Version RangeStatus
D-Link DIR-822A A_101 affected
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I. Basic Information for CVE-2026-86296

Vulnerability Information
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Vulnerability Title
D-Link DIR-822A udhcpcd serverpacket.c strcpy stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in D-Link DIR-822A A_101. This vulnerability affects the function strcpy of the file udhcpcd/serverpacket.c of the component udhcpcd. This manipulation causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
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udhcpcd组件的serverpacket.c文件中strcpy函数使用不当，导致栈缓冲区溢出，攻击者可远程利用该漏洞。
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-2026-86296

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III. Intelligence Information for CVE-2026-86296

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Vendor Advisories for CVE-2026-86296 (1)

Security Blog Posts for CVE-2026-86296 (1)

Vendor Pages for CVE-2026-86296 (1)

Other References for CVE-2026-86296 (2)

Same Patch Batch · D-Link · 2026-09-07 · 3 CVEs total

CVE-2026-86295 8.3 HIGH D-Link DIR-895L udhcpcd serverpacket.c sendACK command injection
CVE-2026-86297 8.1 HIGH D-Link DIR-605 L2TP Control Message tunnel.c tunnel_set_params off-by-one

IV. Related Vulnerabilities

Same product: DIR-822A
Same vendor: D-Link
Same weakness: CWE-121

V. Comments for CVE-2026-86296

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