CVE-2021-23247Network attack vector

Unauthenticated code execution via command injection

Published Apr 1, 2022 · Updated Aug 3, 2024

Command injection in the quick game engine in OPPO Quick App 4.5.0 allows remote attackers to execute arbitrary code via network input. The engine passes attacker-controlled input into an operating-system command without neutralizing command metacharacters; OPPO has not identified the affected function or input field. No authentication or user interaction is required, and successful exploitation executes code in the Quick App engine's security context.

CVSS severity9.8
Critical
EPSS probability1.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Command injection in the quick game engine in OPPO Quick App 4.5.0 allows remote attackers to execute arbitrary code via network input. The engine passes attacker-controlled input into an operating-system command without neutralizing command metacharacters; OPPO has not identified the affected function or input field. No authentication or user interaction is required, and successful exploitation executes code in the Quick App engine's security context.

The record

CVE
CVE-2021-23247
Published
Apr 1, 2022
Updated
Aug 3, 2024
Vendor
OPPO
Product
Quick App
Classifications
CWE-77
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 1, 2022CVE 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

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=4.5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OPPO · Quick Appversion=4.5.0

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo