CVE-2026-76465

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A vulnerability in the MPLS Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software for Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper validation when an affected device is processing an MPLS echo-request packet. An attacker could exploit this vulnerability by sending a crafted MPLS echo-request to an IP address on an affected device. A successful exploit could allow the attacker to execute arbitrary code with root privileges and could cause process crashes, which could result in a device reload and a DoS condition.

CVSS 9.8 (CRITICAL)

Attention and evidence

HYPE SCORE

0.6/10

REALITY · THREAT PRIORITY

3.4/10

General review priority; not probability

Evidence confidence: Insufficient evidence

Why this priority?

Technical severity: CVSS 9.8: +3.43
Fresh EPSS: 0.46%: +0.01

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 4 documents and public datasets.

Hype components

Headline sample (25%)

0/100

Press, 30 days (60%)

10/100

Grounded branding (15%)

0/100

HYPE TOTAL6/100

Sources and documents

Cisco Security Advisory

Technical advisory · 07 Oct 2026, 16:00 · Cisco Advance Notification for Publication of October 7, 2026, Security Advisories

Cisco Security Advisory

Press · 07 Oct 2026, 16:00 · Cisco Advance Notification for Publication of October 7, 2026, Security Advisories

Cisco Security Advisory

Technical advisory · 07 Oct 2026, 16:00 · Cisco Nexus 3000 and 9000 Series Switches MPLS OAM Remote Code Execution Vulnerability

Cisco Security Advisory

Press · 07 Oct 2026, 16:00 · Cisco Nexus 3000 and 9000 Series Switches MPLS OAM Remote Code Execution Vulnerability

Score evolution

● Hype ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.6 · reality 3.4 (2026-11-02 15:14). The curve appears once the score changes.

Public exploit evidence

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs. Published 29 days ago. Exploitation evidence usually takes weeks to show up: a low reality score can mean there is no data yet, not that the flaw is mild.

Evidence in context

Confidence in exploitation evidence: Insufficient evidence
Priority basis: Exploitation in attacks unconfirmed; CVSS 9.8; EPSS 0.5%
Attention, last 30 days: 2 distinct story titles; 2 press documents; 1 publisher domains.
Technical potential: network access, no prior privileges, no user interaction.
Observed activity: No exploitation observation is recorded.
Known scale: Not quantified.
Evidence confidence basis: Insufficient evidence

Score evaluated: 2026-11-05 14:00:25.177862+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline

First press mention

07 Oct 2026, 16:00

Latest press mention

07 Oct 2026, 16:00

Published

07 Oct 2026, 16:14

Score calculated

05 Nov 2026, 14:00