HOMEVULNERABILITIESCVE-2020-8438
HIGH

CVE-2020-8438

CWE-78Published: January 29, 2020· Updated: Jun 17, 2026

7.2
CVSS v3.1

Official Description

Ruckus ZoneFlex R500 104.0.0.0.1347 devices allow an authenticated attacker to execute arbitrary OS commands via the hidden /forms/nslookupHandler form, as demonstrated by the nslookuptarget=|cat${IFS} substring.

NVD Source

Technical Analysis

CVE-2020-8438 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high 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 7.2.

CVSS v3.1 Vector Breakdown

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

Affected Vendors & Products

arris2 product(s)
ruckus zoneflex r500 firmwareruckus zoneflex r500
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://sku11army.blogspot.com/2020/01/ruckus-rce-ruckus-m500-via-injection-on.html
ADVISORYhttps://sku11army.blogspot.com/2020/01/ruckus-rce-ruckus-m500-via-injection-on.html

All References (2)

→
https://sku11army.blogspot.com/2020/01/ruckus-rce-ruckus-m500-via-injection-on.htmlExploit · Third Party Advisory
→
https://sku11army.blogspot.com/2020/01/ruckus-rce-ruckus-m500-via-injection-on.htmlExploit · Third Party Advisory

Quick Facts

CVE IDCVE-2020-8438
CVSS Score7.2 / 10
SeverityHIGH
WeaknessCWE-78
CISA KEVNo
Affected1 vendor(s)
PublishedJan 29, 2020

Related CVEs (CWE-78)

CVE-2022-33194
10.0
CVE-2022-33193
10.0
CVE-2026-6349
10.0
CVE-2021-33032
10.0
CVE-2022-33192
10.0
CVE-2022-33195
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-8438 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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