CVE-2026-7611Network attack vector

Unauthenticated code execution via forgeable firmware CRC32

Published May 2, 2026 · Updated May 2, 2026

Improper firmware authentication in TRENDnet TEW-821DAP 1.12B01 allows remote attackers to install modified firmware. The platform_do_upgrade_cameo_dev function in cameo_dev.sh relies on forgeable CRC32 values rather than cryptographic authenticity verification. Exploitation requires crafting an image with the expected CRC32 value and allows attacker-controlled code execution or a service interruption.

CVSS severity6.3
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper firmware authentication in TRENDnet TEW-821DAP 1.12B01 allows remote attackers to install modified firmware. The platform_do_upgrade_cameo_dev function in cameo_dev.sh relies on forgeable CRC32 values rather than cryptographic authenticity verification. Exploitation requires crafting an image with the expected CRC32 value and allows attacker-controlled code execution or a service interruption.

The record

CVE
CVE-2026-7611
Published
May 2, 2026
Updated
May 2, 2026
Vendor
TRENDnet
Product
TEW-821DAP
Classifications
CWE-345, T1601.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 2, 2026CVE publishedPublication date reported by the CVE source.
  2. May 2, 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=1.12B01

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

TRENDnet · TEW-821DAPversion=1.12B01

Published CVSS scores

8.1NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
2.6VulDBAV:N/AC:H/Au:N/C:N/I:P/A:N
6.3VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
3.7VulDBCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity
T1601.001Patch System Image

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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