CVE-2021-27455

Information disclosure via unchecked DPA file length

Published Jul 2, 2021 · Updated Aug 3, 2024

Out-of-bounds read in DOPSoft 4.0.10.17 and earlier allows attackers to disclose process memory through a crafted DPA project file. The DPA parser fails to validate user-controlled length data and reads past the end of an allocated buffer. A user must open the malicious file or visit a page that delivers it; the flaw discloses memory and can support a vulnerability chain.

CVSS severity5.5
Medium
EPSS probability0.74%
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 DOPSoft 4.0.10.17 and earlier allows attackers to disclose process memory through a crafted DPA project file. The DPA parser fails to validate user-controlled length data and reads past the end of an allocated buffer. A user must open the malicious file or visit a page that delivers it; the flaw discloses memory and can support a vulnerability chain.

The record

CVE
CVE-2021-27455
Published
Jul 2, 2021
Updated
Aug 3, 2024
Vendor
Delta Electronics, Inc.
Product
DOPSoft
Classifications
CWE-125, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 2, 2021CVE 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=DOPSoft Version 4.0.10.17 and prior

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Delta Electronics, Inc. · DOPSoftversion=DOPSoft Version 4.0.10.17 and prior

Published CVSS scores

3.3Trend Micro Zero Day InitiativeCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:P/I:N/A:N
5.5NIST NVDCVSS: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
T1204.002User Execution: Malicious File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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