CVE-2026-20033Disclosure

LOWCVSS 7.4 · HIGH

Signal is active with 2 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

A vulnerability in Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient validation when processing specific Ethernet frames. An attacker could exploit this vulnerability by sending a crafted Ethernet frame to the management interface of an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition. Note: Only the out-of-band (OOB) management interface is affected.

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0.0/ 10 priority

Sources & remediation

Other references

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-cpdos-qLsv6pFD

Weakness type (CWE)

CWE-805

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Threat summary

3 mentions across 2 observed days
Momentum state: stable

What's happening

Technical details provided in 2 signals
Disclosure: 2 classified signals
General: 1 classified signal
Peaked at 2 mentions on most recent observed day (2026-02-26)
3 total mentions across 2 days

Deep dive

Activity timeline3 mentions / 2d

Signal classification2 categories

Disclosure

266.7%

General

133.3%

Referenced assets4 URLs

By indicator

Classification over time

Date	Total	Labels

2026-02-25	1	General1
2026-02-26	2	Disclosure2

Full discourse3 posts

Infoflowcloud@infoflowcloud225d
Disclosure
🚨*CVE* CVE-2026-20033 A vulnerability in Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition … https://www.cve.org/CVERecord?id=CVE-2026-20033 ----- Traducción: CVE-2026-20033 Una… http://infoflow.cloud`
Post summary
The post announces CVE-2026-20033, a DoS vulnerability in Cisco Nexus 9000 Series Fabric Switches in ACI mode, without providing PoC, exploit, or patch details.
0000050
55 followersView on X
CVE@CVEnew225d
Disclosure
CVE-2026-20033 A vulnerability in Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition … https://www.cve.org/CVERecord?id=CVE-2026-20033
Post summary
The text announces a DoS vulnerability in Cisco Nexus 9000 Series Fabric Switches in ACI mode, providing basic technical details but no PoC, exploit, or patch information.
00000195
56.6K followersView on X
Vulmon Vulnerability Feed@VulmonFeeds225d
General
CVE-2026-20033 Cisco Nexus 9000 ACI Fabric Switches DoS Vulnerability vi... https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-20033 Don't wait vulnerability scanning results: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=2
Post summary
A tweet references CVE-2026-20033, a DoS vulnerability in Cisco Nexus 9000 ACI Fabric Switches, linking to a vulnerability details page but providing no further technical or exploit information.
0000045
4.0K followersView on X

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