CVE-2025-8159Network attack vector

Authenticated code execution via curTime stack overflow

Published Jul 25, 2025 · Updated Jul 25, 2025

Stack-based buffer overflow in D-Link DIR-513 1.0 allows remote authenticated users to execute code via a crafted curTime HTTP POST value. The formLanguageChange handler at /goform/formLanguageChange processes the attacker-controlled value without enforcing the destination stack buffer's bounds. Access to the management HTTP interface and low-privileged credentials are required; exploitation can compromise confidentiality, integrity, and availability.

CVSS severity9.8
Critical
EPSS probability15.62%
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 1.0 allows remote authenticated users to execute code via a crafted curTime HTTP POST value. The formLanguageChange handler at /goform/formLanguageChange processes the attacker-controlled value without enforcing the destination stack buffer's bounds. Access to the management HTTP interface and low-privileged credentials are required; exploitation can compromise confidentiality, integrity, and availability.

The record

CVE
CVE-2025-8159
Published
Jul 25, 2025
Updated
Jul 25, 2025
Vendor
D-Link
Product
DIR-513
Classifications
CWE-121, CWE-787, CWE-119, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

D-Link · DIR-513version=1.0

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
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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