HOMEVULNERABILITIESCVE-2020-14511
CRITICAL

CVE-2020-14511

CWE-121Published: July 15, 2020· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

Malicious operation of the crafted web browser cookie may cause a stack-based buffer overflow in the system web server on the EDR-G902 and EDR-G903 Series Routers (versions prior to 5.4).

NVD Source

Technical Analysis

CVE-2020-14511 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

moxa8 product(s)
edr-g902-t firmwareedr-g902-tedr-g902 firmwareedr-g902edr-g903-t firmwareedr-g903-tedr-g903 firmwareedr-g903
Source: NVD CPE · 8 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://us-cert.cisa.gov/ics/advisories/icsa-20-196-02
ADVISORYhttps://us-cert.cisa.gov/ics/advisories/icsa-20-196-02

All References (2)

→
https://us-cert.cisa.gov/ics/advisories/icsa-20-196-02Third Party Advisory · US Government Resource
→
https://us-cert.cisa.gov/ics/advisories/icsa-20-196-02Third Party Advisory · US Government Resource

Quick Facts

CVE IDCVE-2020-14511
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-121
CISA KEVNo
Affected1 vendor(s)
PublishedJul 15, 2020

Related CVEs (CWE-121)

CVE-2014-0787
10.0
CVE-2026-12847
10.0
CVE-2021-21960
10.0
CVE-2021-21961
10.0
CVE-2017-20230
10.0
CVE-2023-3943
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-14511 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.COM. CVE data is provided under the NVD usage policy.
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