CVE-2016-1409

mediumpriority · track · 31EPSS 0.039 · 90 %ileEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

3.90% (90th) EPSS

CVSS 5 · medium

Is it mine?

4,898 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Hsecondary · CVSS-BT (t0sche)

v3.15.8mediumAV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Lsecondary · FSTEC (BDU) RU

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-20US

affected products (4,898)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Cisco Systems Inc. Adaptive Security Applianceall versionsfstec_bduRU
Cisco Systems Inc. Cisco IOSall versionsfstec_bduRU
Cisco Systems Inc. Cisco IOS XE2.1 → 3.17Sfstec_bduRU
Cisco Systems Inc. Cisco IOS XR2.0.0 → 5.3.2fstec_bduRU
Cisco Systems Inc. NX-OSall versionsfstec_bduRU
Cisco Systems Inc. StarOSall versionsfstec_bduRU
cisco ios= 12.0(1)nvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0(1)dbnvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0(1)snvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0(1)tnvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0(1)t1nvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0(1)xanvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0(1)xa1nvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0(1)xa2nvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0(1)xa3nvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0(1)xa4nvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0(1)xbnvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0(1)xb1nvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
cisco ios= 12.0(1)xenvdUScpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*

showing 20 of 4,898

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2016-05-29modified 2026-06-17

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+25168 more

references (18)

External citations — patches, advisories, analysis.

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