HOMEVULNERABILITIESCVE-2019-11535
CRITICAL

CVE-2019-11535

CWE-77Published: July 17, 2019· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

Unsanitized user input in the web interface for Linksys WiFi extender products (RE6400 and RE6300 through 1.2.04.022) allows for remote command execution. An attacker can access system OS configurations and commands that are not intended for use beyond the web UI.

NVD Source

Technical Analysis

CVE-2019-11535 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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

linksys4 product(s)
re6400 firmwarere6400re6300 firmwarere6300
Source: NVD CPE · 4 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
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Official Patches & Advisories

ADVISORYhttp://s3.amazonaws.com/downloads.linksys.com/support/assets/releasenotes/Linksys%20RE6300%20RE6400%20Firmware%20Release%20Notes_v1.2.05.001.txt
ADVISORYhttp://s3.amazonaws.com/downloads.linksys.com/support/assets/releasenotes/Linksys%20RE6300%20RE6400%20Firmware%20Release%20Notes_v1.2.05.001.txt

All References (2)

→
http://s3.amazonaws.com/downloads.linksys.com/support/assets/releasenotes/Linksys%20RE6300%20RE6400%20Firmware%20Release%20Notes_v1.2.05.001.txtRelease Notes · Third Party Advisory
→
http://s3.amazonaws.com/downloads.linksys.com/support/assets/releasenotes/Linksys%20RE6300%20RE6400%20Firmware%20Release%20Notes_v1.2.05.001.txtRelease Notes · Third Party Advisory

Quick Facts

CVE IDCVE-2019-11535
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-77
CISA KEVNo
Affected1 vendor(s)
PublishedJul 17, 2019

Related CVEs (CWE-77)

CVE-2024-28354
10.0
CVE-2015-5082
10.0
CVE-2014-9682
10.0
CVE-2015-7541
10.0
CVE-2018-16462
10.0
CVE-2024-32766
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-11535 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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