HOMEVULNERABILITIESCVE-2020-12125
CRITICAL

CVE-2020-12125

CWE-120Published: October 2, 2020· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

A remote buffer overflow vulnerability in the /cgi-bin/makeRequest.cgi endpoint of the WAVLINK WN530H4 M30H4.V5030.190403 allows an attacker to execute arbitrary machine instructions as root without authentication.

NVD Source

Technical Analysis

CVE-2020-12125 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

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 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

wavlink2 product(s)
wn530h4 firmwarewn530h4
Source: NVD CPE · 2 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://cerne.xyz/bugs/CVE-2020-12125
ADVISORYhttps://www.wavlink.com/en_us/product/WL-WN530H4.html
ADVISORYhttps://cerne.xyz/bugs/CVE-2020-12125
ADVISORYhttps://www.wavlink.com/en_us/product/WL-WN530H4.html

All References (4)

→
https://cerne.xyz/bugs/CVE-2020-12125Third Party Advisory
→
https://www.wavlink.com/en_us/product/WL-WN530H4.htmlProduct · Vendor Advisory
→
https://cerne.xyz/bugs/CVE-2020-12125Third Party Advisory
→
https://www.wavlink.com/en_us/product/WL-WN530H4.htmlProduct · Vendor Advisory

Quick Facts

CVE IDCVE-2020-12125
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-120
CISA KEVNo
Affected1 vendor(s)
PublishedOct 2, 2020

Related CVEs (CWE-120)

CVE-2021-33972
10.0
CVE-2026-24810
10.0
CVE-1999-0385
10.0
CVE-2001-0191
10.0
CVE-2021-33975
10.0
CVE-2010-10016
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-12125 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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