CVE-2022-28330Network attack vector

Memory disclosure via mod_isapi out-of-bounds read

Published Jun 8, 2022 · Updated Aug 3, 2024

Out-of-bounds read in mod_isapi in Apache HTTP Server 2.4.53 and earlier allows remote attackers to disclose process memory on Windows. Apache has not published the specific function, buffer, or length-validation error that causes mod_isapi to read past a memory boundary. The flaw is reachable only on Windows servers configured to process requests through mod_isapi, and the documented consequence is limited memory disclosure.

CVSS severity5.3
Medium
EPSS probability3.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in mod_isapi in Apache HTTP Server 2.4.53 and earlier allows remote attackers to disclose process memory on Windows. Apache has not published the specific function, buffer, or length-validation error that causes mod_isapi to read past a memory boundary. The flaw is reachable only on Windows servers configured to process requests through mod_isapi, and the documented consequence is limited memory disclosure.

The record

CVE
CVE-2022-28330
Published
Jun 8, 2022
Updated
Aug 3, 2024
Vendor
The Apache Software Foundation
Product
Apache HTTP Server
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 8, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=Apache HTTP Server <=2.4.53

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache HTTP Serverversion=Apache HTTP Server <=2.4.53

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

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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