CVE-2025-45029Public exploitNetwork attack vector

Remote CGI-process crash via unchecked Content-Length allocation

Published Jul 2, 2025 · Updated Jul 5, 2026

Heap overflow in WINSTAR WN572HP3 firmware 230525 allows remote attackers to crash the upload CGI process via a crafted Content-Length. The upload.cgi program converts CONTENT_LENGTH with strtoll, adds one, and passes the unrestricted result to malloc before continuing after allocation failure. The published QEMU demonstration requires a token-prefixed cookie and a patched conditional branch, and establishes a CGI-process crash rather than code execution.

CVSS severity6.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap overflow in WINSTAR WN572HP3 firmware 230525 allows remote attackers to crash the upload CGI process via a crafted Content-Length. The upload.cgi program converts CONTENT_LENGTH with strtoll, adds one, and passes the unrestricted result to malloc before continuing after allocation failure. The published QEMU demonstration requires a token-prefixed cookie and a patched conditional branch, and establishes a CGI-process crash rather than code execution.

The record

CVE
CVE-2025-45029
Published
Jul 2, 2025
Updated
Jul 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-122, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

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

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-122Heap-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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