CVE-2026-7853Public exploitNetwork attack vector

Remote code execution via unchecked sprintf

Published May 5, 2026 · Updated May 5, 2026

Stack-based buffer overflow in D-Link DI-8100 16.07.26A1 allows remote attackers to execute code via crafted HTTP requests. The /auto_reboot.asp handler stores attacker-controlled enable and time values in NVRAM, then passes them to sprintf into the 104-byte acStack_90 stack buffer without checking their lengths, allowing return-address overwrite. The published assessment requires no privileges, although the public demonstration logs in before sending the request; exploitation can crash jhttpd and force a device reboot or redirect execution.

CVSS severity9.8
Critical
EPSS probability1.52%
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-8100 16.07.26A1 allows remote attackers to execute code via crafted HTTP requests. The /auto_reboot.asp handler stores attacker-controlled enable and time values in NVRAM, then passes them to sprintf into the 104-byte acStack_90 stack buffer without checking their lengths, allowing return-address overwrite. The published assessment requires no privileges, although the public demonstration logs in before sending the request; exploitation can crash jhttpd and force a device reboot or redirect execution.

The record

CVE
CVE-2026-7853
Published
May 5, 2026
Updated
May 5, 2026
Vendor
D-Link
Product
DI-8100
Classifications
CWE-119, CWE-120, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 5, 2026CVE publishedPublication date reported by the CVE source.
  2. May 5, 2026Record 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=16.07.26A1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

D-Link · DI-8100version=16.07.26A1

Published CVSS scores

8.9VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
9.8VulDBCVSS:3.1/AV:N/AC:L/PR:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
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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