CVE-2022-21675

Arbitrary file overwrite via unchecked archive paths

Published Jan 12, 2022 · Updated Apr 23, 2025

Path traversal in Konloch Bytecode Viewer before 2.11.0 allows context-dependent attackers to overwrite files via crafted archives. ZipUtils.unzipFilesToPath joins the destination directory with an untrusted archive entry name and writes it without a correct canonical boundary check. Opening a crafted archive triggers extraction; overwritten executables can run later when the system or a local user invokes them.

CVSS severity9.9
Critical
EPSS probability2.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Konloch Bytecode Viewer before 2.11.0 allows context-dependent attackers to overwrite files via crafted archives. ZipUtils.unzipFilesToPath joins the destination directory with an untrusted archive entry name and writes it without a correct canonical boundary check. Opening a crafted archive triggers extraction; overwritten executables can run later when the system or a local user invokes them.

The record

CVE
CVE-2022-21675
Published
Jan 12, 2022
Updated
Apr 23, 2025
Vendor
Konloch
Product
Bytecode Viewer
Classifications
CWE-22, T1204.002
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Jan 12, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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=< 2.11.0

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Konloch · Bytecode Viewerversion=< 2.11.0

Published CVSS scores

9.9GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1204.002Malicious 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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