CVE-2021-45345Public exploitNetwork attack vector

Unauthenticated server crash via oversized HTTP requests

Published May 10, 2023 · Updated Jan 28, 2025

Buffer overflow in en3rgy WebcamServer 0.5.2 and earlier allows remote attackers to crash the server with repeated large HTTP requests. The WebcamServer.exe process fails to clean up memory while processing oversized POST request targets, eventually triggering an unhandled Structured Exception Handler. No authentication or user interaction is required; the demonstrated consequence is an application crash, with no code execution, privilege gain, or data disclosure reported.

CVSS severity7.5
High
EPSS probability1.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in en3rgy WebcamServer 0.5.2 and earlier allows remote attackers to crash the server with repeated large HTTP requests. The WebcamServer.exe process fails to clean up memory while processing oversized POST request targets, eventually triggering an unhandled Structured Exception Handler. No authentication or user interaction is required; the demonstrated consequence is an application crash, with no code execution, privilege gain, or data disclosure reported.

The record

CVE
CVE-2021-45345
Published
May 10, 2023
Updated
Jan 28, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 10, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 28, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499Endpoint Denial of Service

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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