D-Link DI-7100G C1 up to 20250928 jhttpd /webchat/hi_block.asp sub_4BD4F8 popupId buffer 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.
8.4$0-$5k0.79

Summaryinfo

A vulnerability classified as critical was found in D-Link DI-7100G C1 up to 20250928. Impacted is the function sub_4BD4F8 of the file /webchat/hi_block.asp of the component jhttpd. The manipulation of the argument popupId results in buffer overflow. This vulnerability is reported as CVE-2025-11339. The attack can be launched remotely. Moreover, an exploit is present.

Detailsinfo

A vulnerability classified as critical has been found in D-Link DI-7100G C1 up to 20250928. Affected is the function sub_4BD4F8 of the file /webchat/hi_block.asp of the component jhttpd. The manipulation of the argument popupId with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is available at yuque.com. This vulnerability is traded as CVE-2025-11339. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details and 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 10/07/2025).

The exploit is shared for download at yuque.com. It is declared as proof-of-concept. By approaching the search of inurl:webchat/hi_block.asp it is possible to find vulnerable targets with Google Hacking.

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

Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Google Hack: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

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

10/05/2025 VulDB entry created
10/06/2025 +0 days Advisory disclosed
10/07/2025 +1 days VulDB entry last update

Sourcesinfo

Vendor: dlink.com

Advisory: yuque.com
Status: Not defined

CVE: CVE-2025-11339 (🔒)
GCVE (CVE): GCVE-0-2025-11339
GCVE (VulDB): GCVE-100-327222
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 10/06/2025 00:14
Updated: 10/07/2025 06:54
Changes: 10/06/2025 00:14 (57), 10/06/2025 17:33 (1), 10/07/2025 06:54 (31)
Complete: 🔍
Submitter: sheratan
Cache ID: 216::103

Submitinfo

Accepted

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