VDB-399458 · Submit #906297 · CVE-2026-86296

D-Link DIR-822A A_101 udhcpcd udhcpcd/serverpacket.c strcpy stack-based overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.1	$0-$5k	1.06+

Summaryinfo

A vulnerability labeled as very critical has been found in D-Link DIR-822A A_101. This issue affects the function strcpy of the file udhcpcd/serverpacket.c of the component udhcpcd. Such manipulation leads to stack-based overflow. This vulnerability is listed as CVE-2026-86296. The attack may be performed from remote. In addition, an exploit is available.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in D-Link DIR-822A A_101. Affected by this issue is the function strcpy of the file udhcpcd/serverpacket.c of the component udhcpcd. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability.

The advisory is available at tzh00203.notion.site. This vulnerability is handled as CVE-2026-86296. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/06/2026).

The exploit is available at tzh00203.notion.site. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Router Operating System

Vendor

D-Link

Name

DIR-822A

Version

A_101

License

commercial

Website

Vendor: https://www.dlink.com/

CPE 2.3info

🔒

CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.1

VulDB Base Score: 10.0
VulDB Temp Score: 9.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

09/06/2026 Advisory disclosed
09/06/2026 +0 days VulDB entry created
09/06/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: dlink.com

Advisory: tzh00203.notion.site
Status: Not defined

CVE: CVE-2026-86296 (🔒)
GCVE (CVE): GCVE-0-2026-86296
GCVE (VulDB): GCVE-100-399458
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/06/2026 18:20
Changes: 09/06/2026 18:20 (56)
Complete: 🔍
Submitter: tian
Cache ID: 216::103

Submitinfo

Accepted

Submit #906297: D-Link DIR822A_101 A_101 Stack-based Buffer Overflow (by tian)