CVE-2025-11338Public exploitNetwork attack vector

Authenticated memory corruption via crafted openid parameter

Published Oct 6, 2025 · Updated Oct 6, 2025

Buffer overflow in D-Link DI-7100G C1 firmware 20250928 allows remote authenticated users to corrupt jhttpd memory through login requests. The sub_4C0990 function in /webchat/login.cgi processes a crafted openid argument without enforcing the destination buffer's bounds. Low-privileged network access to the CGI endpoint is sufficient, and the documented consequence is corruption of the jhttpd process memory.

CVSS severity9.8
Critical
EPSS probability1.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in D-Link DI-7100G C1 firmware 20250928 allows remote authenticated users to corrupt jhttpd memory through login requests. The sub_4C0990 function in /webchat/login.cgi processes a crafted openid argument without enforcing the destination buffer's bounds. Low-privileged network access to the CGI endpoint is sufficient, and the documented consequence is corruption of the jhttpd process memory.

The record

CVE
CVE-2025-11338
Published
Oct 6, 2025
Updated
Oct 6, 2025
Vendor
D-Link
Product
DI-7100G
Classifications
CWE-119, CWE-120, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=20250928

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

D-Link · DI-7100Gversion=20250928

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
7.4VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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