CVE-2020-27464Public exploit

Arbitrary code execution via crafted update ZIP

Published Aug 20, 2021 · Updated Aug 4, 2024

Code execution in rConfig 3.9.6 and earlier allows attackers to execute arbitrary code by installing a crafted update ZIP. The updater.php endpoint accepts a modified rConfig archive containing a PHP webshell and installs its contents without adequate validation. Reachability requires the crafted archive to be uploaded and installed; successful exploitation places executable PHP on the server and yields webshell access.

CVSS severity7.8
High
EPSS probability2.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in rConfig 3.9.6 and earlier allows attackers to execute arbitrary code by installing a crafted update ZIP. The updater.php endpoint accepts a modified rConfig archive containing a PHP webshell and installs its contents without adequate validation. Reachability requires the crafted archive to be uploaded and installed; successful exploitation places executable PHP on the server and yields webshell access.

The record

CVE
CVE-2020-27464
Published
Aug 20, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-862, T1505.003
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 20, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

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

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1505.003Server Software Component: Web Shell

Public exploit references

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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