D-Link DI-7100G C1 up to 20250928 jhttpd /webchat/login.cgi sub_4C0990 openid 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.
8.9$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in D-Link DI-7100G C1 up to 20250928. This issue affects the function sub_4C0990 of the file /webchat/login.cgi of the component jhttpd. The manipulation of the argument openid leads to buffer overflow. This vulnerability is documented as CVE-2025-11338. The attack can be initiated remotely. Additionally, an exploit exists.

Detailsinfo

A vulnerability was found in D-Link DI-7100G C1 up to 20250928. It has been rated as critical. This issue affects the function sub_4C0990 of the file /webchat/login.cgi of the component jhttpd. The manipulation of the argument openid with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability.

The advisory is shared at yuque.com. The identification of this vulnerability is CVE-2025-11338. The exploitation is known to be easy. The attack may be initiated remotely. Technical details as well as a public exploit are known. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/20/2025).

The exploit is available at yuque.com. 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 the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

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: 9.1
VulDB Meta Temp Score: 8.9

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

NVD Base Score: 9.8
NVD Vector: 🔒

CNA Base Score: 8.8
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

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
11/20/2025 +45 days VulDB entry last update

Sourcesinfo

Vendor: dlink.com

Advisory: yuque.com
Status: Not defined

CVE: CVE-2025-11338 (🔒)
GCVE (CVE): GCVE-0-2025-11338
GCVE (VulDB): GCVE-100-327221
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 10/06/2025 00:14
Updated: 11/20/2025 04:45
Changes: 10/06/2025 00:14 (57), 10/06/2025 17:32 (1), 10/06/2025 17:34 (1), 10/09/2025 07:53 (31), 11/20/2025 04:45 (11)
Complete: 🔍
Submitter: sheratan
Cache ID: 216::103

Submitinfo

Accepted

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!