CVE-2022-38955Network attack vector

Backdoor installation or service interruption via CRC bypass

Published Sep 20, 2022 · Updated May 28, 2025

Firmware integrity bypass in Netgear WPN824EXT 1.1.1_1.1.9 allows man-in-the-middle attackers to install modified firmware images. The firmware-upload validation path accepts an intercepted, attacker-modified image because its CRC integrity check can be bypassed. Exploitation requires user interaction during a network firmware upload and permits a backdoor or an unspecified device service interruption.

CVSS severity7.5
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Firmware integrity bypass in Netgear WPN824EXT 1.1.1_1.1.9 allows man-in-the-middle attackers to install modified firmware images. The firmware-upload validation path accepts an intercepted, attacker-modified image because its CRC integrity check can be bypassed. Exploitation requires user interaction during a network firmware upload and permits a backdoor or an unspecified device service interruption.

The record

CVE
CVE-2022-38955
Published
Sep 20, 2022
Updated
May 28, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-354, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 20, 2022CVE publishedPublication date reported by the CVE source.
  2. May 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:H/PR:N/UI:R/S:U/C:H/I:H/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:R/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-354Improper Validation of Integrity Check Value
T1557Adversary-in-the-Middle

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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