D-Link DIR-895L A1_102b07 udhcpcd udhcpcd/serverpacket.c sendOffer/sendACK stack-based overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.7$0-$5k1.14+

Summaryinfo

A vulnerability was found in D-Link DIR-895L A1_102b07 and classified as very critical. Affected is the function sendOffer/sendACK of the file udhcpcd/serverpacket.c of the component udhcpcd. Such manipulation leads to stack-based overflow. This vulnerability is uniquely identified as CVE-2026-86509. The attack can only be initiated within the local network. Moreover, an exploit is present.

Detailsinfo

A vulnerability was found in D-Link DIR-895L A1_102b07. It has been rated as very critical. Affected by this issue is the function sendOffer/sendACK 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-2026-86509. The exploitation is known to be easy. The attack needs to be initiated within the local network. 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 09/07/2026).

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.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.6
VulDB Meta Temp Score: 8.7

VulDB Base Score: 9.6
VulDB Temp Score: 8.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: Partially

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

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

09/07/2026 Advisory disclosed
09/07/2026 +0 days VulDB entry created
09/07/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: dlink.com

Advisory: tzh00203.notion.site
Status: Not defined

CVE: CVE-2026-86509 (🔒)
GCVE (CVE): GCVE-0-2026-86509
GCVE (VulDB): GCVE-100-399662
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/07/2026 20:47
Changes: 09/07/2026 20:47 (56)
Complete: 🔍
Submitter: tian
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #906298: D-Link DIR895LA1_102b07 A1_102b07 Stack-based Buffer Overflow (by tian)

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