CVE-2021-20623Network attack vector

SYSTEM code execution via crafted cleartext request

Published Feb 5, 2021 · Updated Aug 3, 2024

Code injection in Panasonic Video Insight VMS before 7.8 allows remote attackers to execute arbitrary code as the SYSTEM user. The IP Server accepts a specially crafted request over unencrypted communication on non-well-known ports and executes attacker-supplied code. No authentication or user interaction is required, and successful exploitation grants control at the service's SYSTEM privilege level.

CVSS severity9.8
Critical
EPSS probability2.81%
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

Code injection in Panasonic Video Insight VMS before 7.8 allows remote attackers to execute arbitrary code as the SYSTEM user. The IP Server accepts a specially crafted request over unencrypted communication on non-well-known ports and executes attacker-supplied code. No authentication or user interaction is required, and successful exploitation grants control at the service's SYSTEM privilege level.

The record

CVE
CVE-2021-20623
Published
Feb 5, 2021
Updated
Aug 3, 2024
Vendor
Panasonic
Product
Video Insight VMS
Classifications
CWE-319, CWE-94, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 5, 2021CVE 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=versions prior to 7.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Panasonic · Video Insight VMSversion=versions prior to 7.8

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5JPCERT/CCAV:N/AC:L/Au:N/C:P/I:P/A:P
10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C

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-319Cleartext Transmission of Sensitive Information
CWE-94Improper Control of Generation of Code ('Code Injection')
T1210Exploitation of Remote Services

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