CVE-2022-30258Network attack vector

Persistent revoked-domain resolution via unvalidated NS caching

Published Nov 21, 2022 · Updated Apr 30, 2025

Ghost-domain resolution in Technitium DNS Server 8.0.2 and earlier allows remote attackers to keep revoked domains resolvable via DNS delegation data. The recursive resolver caches NS records without the additional validation needed to reject a V2 ghost-domain delegation, preserving stale authority data after revocation. Attackers must supply DNS delegation data to the recursive resolver; expired or taken-down malicious domains then remain resolvable for an extended period.

CVSS severity9.8
Critical
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Ghost-domain resolution in Technitium DNS Server 8.0.2 and earlier allows remote attackers to keep revoked domains resolvable via DNS delegation data. The recursive resolver caches NS records without the additional validation needed to reject a V2 ghost-domain delegation, preserving stale authority data after revocation. Attackers must supply DNS delegation data to the recursive resolver; expired or taken-down malicious domains then remain resolvable for an extended period.

The record

CVE
CVE-2022-30258
Published
Nov 21, 2022
Updated
Apr 30, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-706
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 21, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 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

9.8CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

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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-706Use of Incorrectly-Resolved Name or Reference

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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