CVE-2025-13550Public exploitNetwork attack vector

Code execution via unchecked submit-url copy

Published Nov 23, 2025 · Updated Nov 24, 2025

Stack buffer overflow in D-Link DIR-822K 1.00_20250513164613 and DWR-M920 1.1.50 allows remote authenticated users to execute code. The formVpnConfigSetup handler copies the untrusted submit-url value into a fixed-size stack buffer with strcpy and no length check. A crafted HTTP POST can corrupt adjacent memory and crash the management service or redirect execution; the official assessment requires low-privileged access.

CVSS severity8.8
High
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in D-Link DIR-822K 1.00_20250513164613 and DWR-M920 1.1.50 allows remote authenticated users to execute code. The formVpnConfigSetup handler copies the untrusted submit-url value into a fixed-size stack buffer with strcpy and no length check. A crafted HTTP POST can corrupt adjacent memory and crash the management service or redirect execution; the official assessment requires low-privileged access.

The record

CVE
CVE-2025-13550
Published
Nov 23, 2025
Updated
Nov 24, 2025
Vendor
D-Link
Product
DWR-M920
Classifications
CWE-120, CWE-119, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 23, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 24, 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=1.00_20250513164613
  2. Affected versionversion=1.1.50

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

D-Link · DWR-M920version=1.00_20250513164613; version=1.1.50
D-Link · DIR-822Kversion=1.00_20250513164613; version=1.1.50

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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