CVE-2022-28330 | read beyond bounds in mod_isapi

Apache HTTP Server 2.4.53 and earlier on Windows may read beyond bounds when configured to process requests with the mod_isapi module.

Published: 2022-06-09 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-28330 is rated Moderate Risk (54.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 3.38%). EPSS rose +2.87% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-28330

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.50% 3.38% +2.87%
2 2026-04-29 0.56% 0.50% -0.05%
3 2026-03-08 — 0.56% —

Full EPSS history (43 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-28330

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2022-28330

OS Trackers for CVE-2022-28330

vendor priority summary link
alpine medium CVE-2022-28330: 1 source package rows (apache2); 7 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2022-28330
debian unimportant CVE-2022-28330 unimportant priority: Debian including 1 source packages (apache2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2022-28330
redhat low — https://access.redhat.com/security/cve/CVE-2022-28330
suse high CVE-2022-28330 severity important: SUSE including 22 source package names (apache2, apache2-2.4.54-1.1, …), 197 product×package rows across 47 product lines (HPE Helion OpenStack 8, SUSE CaaS Platform 4.0, … (47 product lines)): Known Not Affected 182, Fixed 15. https://www.suse.com/security/cve/CVE-2022-28330/
ubuntu medium CVE-2022-28330 medium priority: Ubuntu including 1 source packages (apache2), 7 status rows across 7 suites (bionic, focal, impish, jammy, trusty, upstream, xenial): not-affected 7. https://ubuntu.com/security/CVE-2022-28330

Affected software / configurations for CVE-2022-28330

Vendor Product Version Raw CPE
apache http_server <= 2.4.53 cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*

References for CVE-2022-28330

cvelogic Threat Intelligence