CVE-2021-43718Public exploitNetwork attack vector

Unauthenticated service interruption via unprotected CGI commands

Published Aug 18, 2026 · Updated Aug 20, 2026

Authentication bypass in Epson EH-TW5350 firmware 150075647YWWV110 allows remote attackers to interrupt service via HTTP. The Web Control /cgi-bin/directsend and /cgi-bin/webconf endpoints execute device-control commands without validating a session or credentials. Network reachability alone is sufficient to power off the projector, switch its input, mute audio, or open an administrative control page.

CVSS severity5.3
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Epson EH-TW5350 firmware 150075647YWWV110 allows remote attackers to interrupt service via HTTP. The Web Control /cgi-bin/directsend and /cgi-bin/webconf endpoints execute device-control commands without validating a session or credentials. Network reachability alone is sufficient to power off the projector, switch its input, mute audio, or open an administrative control page.

The record

CVE
CVE-2021-43718
Published
Aug 18, 2026
Updated
Aug 20, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-288, T1489
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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

5.3CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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-288Authentication Bypass Using an Alternate Path or Channel
T1489Service Stop

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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