CVE-2025-51383Public exploit

Service crash via unbounded host_ip formatting

Published Jul 31, 2025 · Updated Jul 31, 2025

Stack-based buffer overflow in D-Link DI-8200 firmware 16.07.26A1 allows remote authenticated users to crash its web service. The ipsec_road_asp function formats the host_ip value through an unbounded %s conversion into a short stack array, overwriting adjacent memory. Access requires authenticated reachability from an adjacent network; an oversized host_ip value interrupts the management web service.

CVSS severity3.5
Low
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in D-Link DI-8200 firmware 16.07.26A1 allows remote authenticated users to crash its web service. The ipsec_road_asp function formats the host_ip value through an unbounded %s conversion into a short stack array, overwriting adjacent memory. Access requires authenticated reachability from an adjacent network; an oversized host_ip value interrupts the management web service.

The record

CVE
CVE-2025-51383
Published
Jul 31, 2025
Updated
Jul 31, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, T1499.004
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 31, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

3.5CISA-ADPCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1499.004Application or System Exploitation

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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