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Highest advisory severityHigh 1 vendor · 1 advisory

CVE-2026-20010

CVE-2026-20010: 1 tracked advisory record across Cisco. Compare vendor sources and published fix guidance.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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Vendor advisory comparison

Cisco

1 advisory
  • Advisory severityHigh7.4

    High [CVE-2026-20010] Cisco NX-OS Software Link Layer Discovery Protocol Denial of Service Vulnerability

    cisco-sa-n3kn9k_aci_lldp_dos-NdgRrrA3Source published Source updated

    A vulnerability in the Link Layer Discovery Protocol (LLDP) feature of Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause the LLDP process to restart, which could cause an affected device to reload unexpectedly. This vulnerability is due to improper handling of specific fields in an LLDP frame. An attacker could exploit this vulnerability by sending a crafted LLDP packet to an interface of an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition. Note: LLDP is a Layer 2 link…

    Related products — impact not confirmed
    • Cisco Unified Computing System (Managed)
    • Cisco NX-OS Software 10.3(1)
    • Cisco NX-OS Software 10.3(2)
    • Cisco NX-OS Software 10.3(3)

    5 more entries in the full advisory.

    Source-reported affected versions
    • Scope: This vulnerability affects the following Cisco products if they are running a vulnerable software release and have the LLDP feature enabled globally and on at least one interface:
    • Release 4.3 (first fixed: 4.3(6e) / 4.3(6.260003))
    Source-reported fixed versions
    • 4.3(6e) / 4.3(6.260003)
    Mitigation guidance
    • Upgrade to the first fixed release for your train per the Fixed Releases table in this advisory.
    • Release 4.3: upgrade to 4.3(6e) / 4.3(6.260003).
    Workarounds
    • There are no workarounds that address this vulnerability.
    Full advisory and evidenceOpen source bulletin

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