CVE-2026-64966Network attack vector

Authenticated RCE via ZIP path traversal

Published Aug 20, 2026 · Updated Aug 20, 2026

Path traversal in ZIP extraction in ATutor 2.2.4 allows remote authenticated users to execute code via crafted archive filenames. The import and extraction logic writes ZIP members outside the intended directory, letting an instructor place a server-executable .phtml file in the web root instead of course storage. Exploitation requires instructor privileges and succeeds only where that uploaded .phtml file is reachable and executed by the web server, yielding code execution as the web server process.

CVSS severity8.7
High
EPSS probability0.54%
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 ZIP extraction in ATutor 2.2.4 allows remote authenticated users to execute code via crafted archive filenames. The import and extraction logic writes ZIP members outside the intended directory, letting an instructor place a server-executable .phtml file in the web root instead of course storage. Exploitation requires instructor privileges and succeeds only where that uploaded .phtml file is reachable and executed by the web server, yielding code execution as the web server process.

The record

CVE
CVE-2026-64966
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
ATutor
Product
ATutor
Classifications
CWE-22, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 2026Record 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=2.2.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ATutor · ATutorversion=2.2.4

Published CVSS scores

8.7CERT-PLCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1505.003Server Software Component: Web Shell

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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