THREATPORT/VULNERABILITY/CVE-2016-1409
HIGH SEVERITY

CVE-2016-1409

Ios vulnerability

CVSS
7.5
EPSS
3.8%
EPSS pct
89th
Exploited
No known
The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in Cisco IOS XE 2.1 through 3.17S, IOS XR 2.0.0 through 5.3.2, and NX-OS allows remote attackers to cause a denial of service (packet-processing outage) via crafted ND messages, aka Bug ID CSCuz66542, as exploited in the wild in May 2016.
Affected vendor
Cisco
Affected product
Ios
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
  • CWE-20 — Improper Input Validation
Published
2016-05-29

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 3.8% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 89% of all scored CVEs.

Check your external exposure to CVE-2016-1409

  • Confirm whether Cisco Ios is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2016-1409.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2016-1409

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2016-1409 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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