HOMEVULNERABILITIESCVE-2020-7867
HIGH

CVE-2020-7867

CWE-20Published: October 27, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

An improper input validation vulnerability in Helpu solution could allow a local attacker to arbitrary file creation and execution without click file transfer menu. It is possible to file in arbitrary directory for user because the viewer program receive the file from agent with privilege of administrator.

NVD Source

Technical Analysis

CVE-2020-7867 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

helpu1 product(s)
helpuviewer
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=36303
ADVISORYhttps://www.boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=36303

All References (2)

→
https://www.boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=36303Third Party Advisory
→
https://www.boho.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=36303Third Party Advisory

Quick Facts

CVE IDCVE-2020-7867
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-20
CISA KEVNo
Affected1 vendor(s)
PublishedOct 27, 2021

Related CVEs (CWE-20)

CVE-2008-5963
10.0
CVE-2008-4910
10.0
CVE-2009-1669
10.0
CVE-2009-1361
10.0
CVE-2013-1710
10.0
CVE-2011-0922
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-7867 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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