CVE-2025-11339Public exploitNetwork attack vector

Authenticated memory corruption via popupId buffer overflow

Published Oct 6, 2025 · Updated Oct 6, 2025

Buffer overflow in D-Link DI-7100G C1 20250928 allows remote authenticated users to corrupt jhttpd memory via popupId. The sub_4BD4F8 function handling /webchat/hi_block.asp writes the popupId argument into a destination buffer without first enforcing its size. A low-privileged web-management account is required; the public record does not specify whether exploitation produces a crash or code execution.

CVSS severity8.8
High
EPSS probability0.96%
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 20250928 allows remote authenticated users to corrupt jhttpd memory via popupId. The sub_4BD4F8 function handling /webchat/hi_block.asp writes the popupId argument into a destination buffer without first enforcing its size. A low-privileged web-management account is required; the public record does not specify whether exploitation produces a crash or code execution.

The record

CVE
CVE-2025-11339
Published
Oct 6, 2025
Updated
Oct 6, 2025
Vendor
D-Link
Product
DI-7100G
Classifications
CWE-120, CWE-119, 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

9.0VulDBAV: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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