HOMEVULNERABILITIESCVE-2021-36320
CRITICAL

CVE-2021-36320

CWE-331Published: November 20, 2021· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

Dell Networking X-Series firmware versions prior to 3.0.1.8 contain an authentication bypass vulnerability. A remote unauthenticated attacker may potentially hijack a session and access the webserver by forging the session ID.

NVD Source

Technical Analysis

CVE-2021-36320 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

Dell18 product(s)
x1008p firmwarex1008px1018p firmwarex1018px1026p firmwarex1026px1052p firmwarex1052px4012 firmwarex4012x1008 firmwarex1008+6
Source: NVD CPE · 18 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

PATCHhttps://www.dell.com/support/kbdoc/en-us/000193230/dsa-2021-191-dell-networking-x-series-security-update-for-multiple-security-vulnerabilities
PATCHhttps://www.dell.com/support/kbdoc/en-us/000193230/dsa-2021-191-dell-networking-x-series-security-update-for-multiple-security-vulnerabilities

All References (2)

→
https://www.dell.com/support/kbdoc/en-us/000193230/dsa-2021-191-dell-networking-x-series-security-update-for-multiple-security-vulnerabilitiesPatch · Vendor Advisory
→
https://www.dell.com/support/kbdoc/en-us/000193230/dsa-2021-191-dell-networking-x-series-security-update-for-multiple-security-vulnerabilitiesPatch · Vendor Advisory

Quick Facts

CVE IDCVE-2021-36320
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-331
CISA KEVNo
Affected1 vendor(s)
PublishedNov 20, 2021

Related CVEs (CWE-331)

CVE-2024-25730
9.8
CVE-2025-47781
9.8
CVE-2023-4344
9.8
CVE-2023-31176
9.8
CVE-2023-49599
9.8
CVE-2018-1000620
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-36320 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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