CVE-2021-28207Network attack vector

Administrator file disclosure via unfiltered Get Help path

Published Apr 6, 2021 · Updated Sep 16, 2024

ASUS BMC firmware in affected server and workstation controllers allows remote authenticated users to read system files via path traversal in the Get Help file function. The function fails to filter a user-supplied path parameter, allowing traversal outside the intended directory. Administrator permission is required; impact is limited to confidentiality of files returned by the BMC Web management page.

CVSS severity4.9
Medium
EPSS probability1.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

ASUS BMC firmware in affected server and workstation controllers allows remote authenticated users to read system files via path traversal in the Get Help file function. The function fails to filter a user-supplied path parameter, allowing traversal outside the intended directory. Administrator permission is required; impact is limited to confidentiality of files returned by the BMC Web management page.

The record

CVE
CVE-2021-28207
Published
Apr 6, 2021
Updated
Sep 16, 2024
Vendor
ASUSTeK Computer Inc.
Product
BMC Firmware for RS720-E9-RS8-G
Classifications
CWE-22, T1083
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 6, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.15.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

ASUSTeK Computer Inc. · BMC Firmware for RS720-E9-RS8-Gversion=1.15.2
ASUSTeK Computer Inc. · BMC Firmware for RS700A-E9-RS4V2version=1.15.1
ASUSTeK Computer Inc. · BMC Firmware for RS720A-E9-RS24V2version=1.15.1
ASUSTeK Computer Inc. · BMC Firmware for ESC4000 DHD G4version=1.13.7
ASUSTeK Computer Inc. · BMC Firmware for KNPA-U16version=1.13.4
ASUSTeK Computer Inc. · BMC Firmware for RS500A-E10-RS4version=1.15.2
ASUSTeK Computer Inc. · BMC Firmware for ESC8000 G4/10Gversion=1.15.4
ASUSTeK Computer Inc. · BMC Firmware for RS500A-E9-RS4version=1.14.1
ASUSTeK Computer Inc. · BMC Firmware for Z11PA-D8Cversion=1.14.1
ASUSTeK Computer Inc. · BMC Firmware for RS700-E9-RS4version=1.09
ASUSTeK Computer Inc. · BMC Firmware for RS300-E10-RS4version=1.13.6
ASUSTeK Computer Inc. · BMC Firmware for RS700A-E9-RS12V2version=1.15.1
ASUSTeK Computer Inc. · BMC Firmware for RS500-E9-RS4version=1.15.4
ASUSTeK Computer Inc. · BMC Firmware for RS520-E9-RS12-Eversion=1.15.3
ASUSTeK Computer Inc. · BMC Firmware for RS500A-E10-PS4version=1.15.2
ASUSTeK Computer Inc. · BMC Firmware for Pro E800 G4version=1.14.2
ASUSTeK Computer Inc. · BMC Firmware for RS700-E9-RS12version=1.11.5
ASUSTeK Computer Inc. · BMC Firmware for RS720Q-E9-RS24-Sversion=1.15.0
ASUSTeK Computer Inc. · BMC Firmware for RS720-E9-RS12-Eversion=1.15.2
ASUSTeK Computer Inc. · BMC Firmware for WS X299 PRO/SEversion=1.14.1
ASUSTeK Computer Inc. · Z11PA-U12 BMC Firmwareversion=1.15.1
ASUSTeK Computer Inc. · BMC Firmware for RS500-E9-PS4version=1.15.4
ASUSTeK Computer Inc. · BMC Firmware for RS720Q-E9-RS8version=1.15.0
ASUSTeK Computer Inc. · BMC Firmware for WS C422 PRO/SEversion=1.14.1
ASUSTeK Computer Inc. · BMC Firmware for RS720A-E9-RS24-Eversion=1.10.3
ASUSTeK Computer Inc. · Z11PA-U12/10G-2S BMC Firmwareversion=1.15.1
ASUSTeK Computer Inc. · BMC Firmware for Z11PA-D8version=1.14.1
ASUSTeK Computer Inc. · BMC Firmware for RS520-E9-RS8version=1.15.3
ASUSTeK Computer Inc. · BMC Firmware for RS100-E10-PI2version=1.13.6
ASUSTeK Computer Inc. · Z11PR-D16 BMC Firmwareversion=1.15.3
ASUSTeK Computer Inc. · BMC Firmware for RS500A-E9-PS4version=1.14.1
ASUSTeK Computer Inc. · BMC Firmware for ESC4000 G4version=1.15.2
ASUSTeK Computer Inc. · BMC Firmware for ESC4000 G4Xversion=1.11.6
ASUSTeK Computer Inc. · BMC Firmware for RS700A-E9-RS4version=1.10.0
ASUSTeK Computer Inc. · BMC Firmware for RS720-E9-RS24-Uversion=1.14.3
ASUSTeK Computer Inc. · BMC Firmware for E700 G4version=1.14.1
ASUSTeK Computer Inc. · BMC Firmware for RS500-E9-RS4-Uversion=1.15.4
ASUSTeK Computer Inc. · BMC Firmware for RS720A-E9-RS12V2version=1.15.2
ASUSTeK Computer Inc. · BMC Firmware for RS300-E10-PS4version=1.13.6
ASUSTeK Computer Inc. · BMC Firmware for ASMB9-iKVMversion=1.11.12
ASUSTeK Computer Inc. · BMC Firmware for WS C621E SAGEversion=1.15.1
ASUSTeK Computer Inc. · BMC Firmware for ESC8000 G4version=1.15.4
ASUSTeK Computer Inc. · BMC Firmware for RS720Q-E9-RS8-Sversion=1.15.0

Published CVSS scores

4.9TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:H/UI:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory (Path Traversal)
T1083Path and Unrestricted Resource Discovery

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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