CVE-2020-28944Public exploitNetwork attack vector

Remote denial of service via oversized WKS response

Published Apr 30, 2021 · Updated Aug 4, 2024

Denial of service in OX Guard 2.10.4 and earlier allows remote attackers to interrupt service via a WKS server response. The WKS client accepts responses that are deliberately slow or unusually large without effective resource bounds, exhausting processing or memory while handling the response. The attack requires network reachability to the WKS-fetching function and can hang or otherwise interrupt service, with no disclosed confidentiality or integrity impact.

CVSS severity7.5
High
EPSS probability1.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in OX Guard 2.10.4 and earlier allows remote attackers to interrupt service via a WKS server response. The WKS client accepts responses that are deliberately slow or unusually large without effective resource bounds, exhausting processing or memory while handling the response. The attack requires network reachability to the WKS-fetching function and can hang or otherwise interrupt service, with no disclosed confidentiality or integrity impact.

The record

CVE
CVE-2020-28944
Published
Apr 30, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 30, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

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

5.0NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.002Service Exhaustion

Public exploit references

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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