CVE-2022-35218

Service interruption via unchecked packet-origin parameter length

Published Aug 2, 2022 · Updated Sep 16, 2024

Heap overflow in the Windows NHI Health Insurance Web Service Component allows local users to interrupt the service. The component fails to validate the packet-origin parameter length before processing it, permitting an out-of-bounds heap write. Exploitation requires general-user access from the LAN, and the resulting outage persists until the service is restarted.

CVSS severity5.5
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap overflow in the Windows NHI Health Insurance Web Service Component allows local users to interrupt the service. The component fails to validate the packet-origin parameter length before processing it, permitting an out-of-bounds heap write. Exploitation requires general-user access from the LAN, and the resulting outage persists until the service is restarted.

The record

CVE
CVE-2022-35218
Published
Aug 2, 2022
Updated
Sep 16, 2024
Vendor
National Health Insurance Administration
Product
NHI Health Insurance Web Service Component
Classifications
CWE-787, CWE-770, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 2, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record 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=dae0509e5aabde2f110ce8418af67cf7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

National Health Insurance Administration · NHI Health Insurance Web Service Componentversion=dae0509e5aabde2f110ce8418af67cf7

Published CVSS scores

5.5TWCERT/CCCVSS:3.1/AV:L/AC:L/PR:L/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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