CVE-2022-38956Network attack vector

Firmware downgrade via MITM image replacement

Published Sep 20, 2022 · Updated May 28, 2025

Improper integrity validation in Netgear WPN824EXT Firmware 1.1.1_1.1.9 and earlier allows remote attackers to downgrade firmware via a man-in-the-middle attack. The firmware upload process accepts an original older image without enforcing anti-downgrade integrity checks, allowing replacement of the user-submitted image. A man-in-the-middle position and firmware-upload access are required; the demonstrated consequence is installation of an older, vulnerable firmware image that compromises device integrity.

CVSS severity5.3
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper integrity validation in Netgear WPN824EXT Firmware 1.1.1_1.1.9 and earlier allows remote attackers to downgrade firmware via a man-in-the-middle attack. The firmware upload process accepts an original older image without enforcing anti-downgrade integrity checks, allowing replacement of the user-submitted image. A man-in-the-middle position and firmware-upload access are required; the demonstrated consequence is installation of an older, vulnerable firmware image that compromises device integrity.

The record

CVE
CVE-2022-38956
Published
Sep 20, 2022
Updated
May 28, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-354, T1601.001
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

5.3NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/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.

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
T1601.001Downgrade 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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