No exploitation reportedFix available

CVE-2021-36308

Q: Is CVE-2021-36308 actively exploited?

Active exploitation of CVE-2021-36308 has not been confirmed. Its EPSS score was 3.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-36308?

CVE-2021-36308 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2021-11-20
Fixed in10.5.2.8 · 10.5.1.10 · 10.5.0.10 · 10.4.3.8
WeaknessCWE-287 · CWE-288

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Networking OS10, versions prior to October 2021 with Smart Fabric Services enabled, contains an authentication bypass vulnerability. A remote unauthenticated attacker could exploit this vulnerability to gain access and perform actions on the affected system.

Timeline

dates in UTC

2021-11-2002:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-36308?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-36308?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Dell networking os10

Branch	Affected	Fixed in	Source
10.5	≥ 10.5.2.0, < 10.5.2.8	10.5.2.8	NVD
10.5	≥ 10.5.1.0, < 10.5.1.10	10.5.1.10	NVD
10.5	≥ 10.5.0.0, < 10.5.0.10	10.5.0.10	NVD
10.4	< 10.4.3.8	10.4.3.8	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Dell networking os10 to 10.5.2.8 · 10.5.1.10 · 10.5.0.10 · 10.4.3.8

Advisories and patches

www.dell.comPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CNACVSS 3.15.9read 2026-10-23
NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.09.3read 2026-10-23
CNAweakness (CWE)CWE-288read 2026-10-23
NVDweakness (CWE)CWE-287read 2026-10-23
FIRST EPSSEPSS score3.3 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2021-11-20
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-36308?

Is CVE-2021-36308 actively exploited?

Active exploitation of CVE-2021-36308 has not been confirmed. Its EPSS score was 3.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-36308?

CVE-2021-36308 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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