HIGH
Cisco IOS 15.0 through 15.5 and IOS XE 3.3 through 3.16 allow remote attackers to cause a denial of service (device reload) via a crafted DHCPv6 Relay message, aka Bug ID CSCus55821
Published Mar 26, 2016
7.5
HIGHCVSS 3.0
EPSS 1.95%
Description
Cisco IOS 15.0 through 15.5 and IOS XE 3.3 through 3.16 allow remote attackers to cause a denial of service (device reload) via a crafted DHCPv6 Relay message, aka Bug ID CSCus55821.
Affected products
No data.
OR
- 3.3xo_3.3.0xo
- 3.3xo_3.3.1xo
- 3.3xo_3.3.2xo
- 3.5e_3.5.0e
- 3.5e_3.5.1e
- 3.5e_3.5.2e
- 3.5e_3.5.3e
- 3.5s_3.5.0s
- 3.5s_3.5.1s
- 3.5s_3.5.2s
- 3.6e_3.6.0e
- 3.6e_3.6.1e
- 3.6e_3.6.2ae
- 3.6e_3.6.2e
- 3.6e_3.6.3e
- 3.6s_3.6.0s
- 3.6s_3.6.1s
- 3.6s_3.6.2s
- 3.7e_3.7.0e
- 3.7e_3.7.1e
- 3.7e_3.7.2e
- 3.7s_3.7.0s
- 3.7s_3.7.1s
- 3.7s_3.7.2s
- 3.7s_3.7.2ts
- 3.7s_3.7.3s
- 3.7s_3.7.4as
- 3.7s_3.7.4s
- 3.7s_3.7.5s
- 3.7s_3.7.6s
- 3.7s_3.7.7s
- 3.8e_3.8.0e
- 3.8s_3.8.0s
- 3.8s_3.8.1s
- 3.8s_3.8.2s
- 3.9s_3.9.0as
- 3.9s_3.9.0s
- 3.9s_3.9.1as
- 3.9s_3.9.1s
- 3.9s_3.9.2s
- 3.10s_3.10.0s
- 3.10s_3.10.1s
- 3.10s_3.10.1xbs
- 3.10s_3.10.2s
- 3.10s_3.10.3s
- 3.10s_3.10.4s
- 3.10s_3.10.5s
- 3.10s_3.10.6s
- 3.11s_3.11.0s
- 3.11s_3.11.1s
- 3.11s_3.11.2s
- 3.11s_3.11.3s
- 3.11s_3.11.4s
- 3.12s_3.12.0s
- 3.12s_3.12.1s
- 3.12s_3.12.2s
- 3.12s_3.12.3s
- 3.12s_3.12.4s
- 3.13s_3.13.0as
- 3.13s_3.13.0s
- 3.13s_3.13.1s
- 3.13s_3.13.2as
- 3.13s_3.13.2s
- 3.13s_3.13.3s
- 3.13s_3.13.4s
- 3.14s_3.14.0s
- 3.14s_3.14.1s
- 3.14s_3.14.2s
- 3.14s_3.14.3s
- 3.15s_3.15.0s
- 3.15s_3.15.1cs
- 3.15s_3.15.1s
- 3.15s_3.15.2s
- 3.16s_3.16.0cs
- 3.16s_3.16.0s
- 3.16s_3.16.1as
- 3.16s_3.16.1s
- < 2017-01-06
- t-ms14jakucb-1102.5
- snv_124
- < 2.50\(aazi.0\)c0
- 3.08
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
7.8 HIGH NVD
AV:N/AC:L/Au:N/C:N/I:N/A:C
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.95% 0.01948
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.01948
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.95% (0.01948) | 79.48th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.95% (0.01948) | 77.51th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.87% (0.00866) | 73.53th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.21% (0.00211) | 60.00th | v3 (v2023.03.01) |
| Jun 13, 2024 | 0.21% (0.00211) | 59.25th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.21% (0.00211) | 57.24th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.05% (0.01055) | 50.47th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.05% (0.01055) | 48.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.05% (0.01055) | 27.52th | v2 (v2022.01.01) |
Weaknesses (1)
References (2)
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160323-dhcpv6 vendor-advisoryx_refsource_CISCOVendor Advisory
- http://www.securitytracker.com/id/1035381 vdb-entryx_refsource_SECTRACK
| Link | Providers | Tags |
|---|---|---|
| http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160323-dhcpv6 | vendor-advisoryx_refsource_CISCOVendor Advisory | |
| http://www.securitytracker.com/id/1035381 | vdb-entryx_refsource_SECTRACK |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner cisco
Published Mar 26, 2016
Updated Aug 5, 2024
Reserved Jan 4, 2016
Link CVE-2016-1348
CISA Vulnrichment
Updated n/a