CVE-2026-5024Public exploitNetwork attack vector

Code execution via unchecked sprintf in formSetEmail

Published Mar 29, 2026 · Updated Mar 29, 2026

Stack-based buffer overflow in D-Link DIR-513 1.10 allows remote authenticated users to execute code via the web interface. The formSetEmail handler passes the user-controlled config.smtp_email_subject value to sprintf without checking its length, overflowing stack buffer v55. Low-privilege access to the management interface is required; a crafted POST request can crash the service or execute code on the router.

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-based buffer overflow in D-Link DIR-513 1.10 allows remote authenticated users to execute code via the web interface. The formSetEmail handler passes the user-controlled config.smtp_email_subject value to sprintf without checking its length, overflowing stack buffer v55. Low-privilege access to the management interface is required; a crafted POST request can crash the service or execute code on the router.

The record

CVE
CVE-2026-5024
Published
Mar 29, 2026
Updated
Mar 29, 2026
Vendor
D-Link
Product
DIR-513
Classifications
CWE-121, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 29, 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=1.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

D-Link · DIR-513version=1.10

Published CVSS scores

8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7NVDCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.0NVDAV:N/AC:L/Au:S/C:C/I:C/A:C

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based 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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