No exploitation reportedFix available

CVE-2022-28331

Q: Is CVE-2022-28331 actively exploited?

Active exploitation of CVE-2022-28331 has not been confirmed. Its EPSS score was 1.6% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2022-28331?

CVE-2022-28331 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2023-01-31
WeaknessCWE-190

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

On Windows, Apache Portable Runtime 1.7.0 and earlier may write beyond the end of a stack based buffer in apr_socket_sendv(). This is a result of integer overflow.

Timeline

dates in UTC

2023-01-3116:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-28331?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-28331?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Apache portable runtimeversion to verify

Branch	Affected	Fixed in	Source
1.7	≤ 1.7.0	no fix published	NVD

apr

Branch	Affected	Fixed in	Source
1.7	< 1.7.1	1.7.1	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

lists.apache.orgVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2025-03-27
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.19.82025-03-27
NVDCVSS 3.19.8read 2026-10-23
CNAweakness (CWE)CWE-190read 2026-10-23
NVDweakness (CWE)CWE-190read 2026-10-23
FIRST EPSSEPSS score1.6 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2023-01-31
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2022-28331?

On Windows, Apache Portable Runtime 1.7.0 and earlier may write beyond the end of a stack based buffer in apr_socket_sendv(). This is a result of integer overflow.

Is CVE-2022-28331 actively exploited?

Active exploitation of CVE-2022-28331 has not been confirmed. Its EPSS score was 1.6% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-28331?

CVE-2022-28331 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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