CVE-2021-20692

File overwrite via ZIP filename traversal

Published Apr 7, 2021 · Updated Aug 3, 2024

Directory traversal in EikiSoft Archive collectively operation utility 2.10.1.0 and earlier allows attackers to overwrite files via ZIP extraction. ZIP-entry filename processing fails to confine extracted paths to the selected destination, permitting entries to create or overwrite arbitrary files. Exploitation requires a user to expand a malicious ZIP archive, and resulting writes use the application's privileges.

CVSS severity3.3
Low
EPSS probability1.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Directory traversal in EikiSoft Archive collectively operation utility 2.10.1.0 and earlier allows attackers to overwrite files via ZIP extraction. ZIP-entry filename processing fails to confine extracted paths to the selected destination, permitting entries to create or overwrite arbitrary files. Exploitation requires a user to expand a malicious ZIP archive, and resulting writes use the application's privileges.

The record

CVE
CVE-2021-20692
Published
Apr 7, 2021
Updated
Aug 3, 2024
Vendor
EikiSoft
Product
Archive collectively operation utility
Classifications
CWE-22, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 7, 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=Ver.2.10.1.0 and earlier

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

EikiSoft · Archive collectively operation utilityversion=Ver.2.10.1.0 and earlier

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
3.3JPCERT/CCCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
5.8NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:P
4.3JPCERT/CCAV:N/AC:M/Au:N/C:N/I:P/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
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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