CVE-2022-21202

Information disclosure via C5P buffer over-read

Published Apr 12, 2022 · Updated Apr 16, 2025

Out-of-bounds read in Fuji Electric ALPHA5 before 4.3 allows remote attackers to disclose process memory through a crafted C5P file. The Server Operator module fails to validate C5P file data before reading past the end of an allocated buffer. A user must open the file or visit an attacker-controlled page; the disclosed memory can support a separate code-execution exploit.

CVSS severity5.5
Medium
EPSS probability0.73%
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 Fuji Electric ALPHA5 before 4.3 allows remote attackers to disclose process memory through a crafted C5P file. The Server Operator module fails to validate C5P file data before reading past the end of an allocated buffer. A user must open the file or visit an attacker-controlled page; the disclosed memory can support a separate code-execution exploit.

The record

CVE
CVE-2022-21202
Published
Apr 12, 2022
Updated
Apr 16, 2025
Vendor
Fuji Electric
Product
ALPHA5
Classifications
CWE-125, CAPEC-540, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 12, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 16, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All <4.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Fuji Electric · ALPHA5version=All <4.3

Published CVSS scores

4.3NVDAV:N/AC:M/Au:N/C:P/I:N/A:N
3.3ICS-CERTCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
5.5NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CAPEC-540Overread Buffers
T1204.002User Execution Malicious File

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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