A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition
Published Mar 28, 2018 ·Due Mar 17, 2022
8.6
HIGHCVSS 3.1
EPSS 7.61%
Description
A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software performs incomplete input validation of option 82 information that it receives in DHCP Version 4 (DHCPv4) packets from DHCP relay agents. An attacker could exploit this vulnerability by sending a crafted DHCPv4 packet to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuh91645.
Affected products
- Vendor n/a Product Cisco IOS and IOS XE Defaultn/a
- Version Cisco IOS and IOS XEStatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Cisco IOS and IOS XE | n/a |
|
Configuration 1
Running on/with
- n/a
- n/a
- n/a
Configuration 2
Running on/with
- n/a
Configuration 3
Running on/with
- n/a
- n/a
- n/a
- n/a
- n/a
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:C
Date Added
Mar 3, 2022
Patch Due
Mar 17, 2022
Required Action
Apply updates per vendor instructions.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
ActiveAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Nov 8, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (23 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 7.61% (0.07608) | 94.37th | v5 (v2026.06.15) |
| Jun 15, 2026 | 7.61% (0.07613) | 93.76th | v5 (v2026.06.15) |
| Mar 7, 2026 | 5.42% (0.05425) | 90.00th | v4 (v2025.03.14) |
| Dec 16, 2025 | 4.07% (0.04069) | 88.16th | v4 (v2025.03.14) |
| Nov 21, 2025 | 5.61% (0.05609) | 89.91th | v4 (v2025.03.14) |
| Nov 18, 2025 | 1.13% (0.01128) | 76.46th | v4 (v2025.03.14) |
| Mar 30, 2025 | 5.67% (0.05665) | 89.44th | v4 (v2025.03.14) |
| Mar 29, 2025 | 15.79% (0.15790) | 91.26th | v4 (v2025.03.14) |
| Mar 17, 2025 | 5.67% (0.05665) | 89.69th | v4 (v2025.03.14) |
| Jan 16, 2025 | 12.37% (0.12366) | 95.42th | v3 (v2023.03.01) |
| Dec 17, 2024 | 16.50% (0.16505) | 95.99th | v3 (v2023.03.01) |
| Sep 28, 2023 | 0.94% (0.00936) | 81.23th | v3 (v2023.03.01) |
| Apr 26, 2023 | 1.32% (0.01323) | 83.97th | v3 (v2023.03.01) |
| Mar 22, 2023 | 1.31% (0.01312) | 83.86th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.30% (0.01302) | 83.75th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.26% (0.02262) | 50.78th | v1 |
| Jan 6, 2022 | 2.26% (0.02262) | 50.28th | v1 |
| Sep 1, 2021 | 2.26% (0.02262) | 77.65th | v1 |
| Apr 14, 2021 | 2.26% (0.02262) | 0.00th | v1 |
References (7)
- http://www.securityfocus.com/bid/103554 vdb-entryx_refsource_BIDBroken LinkThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040591 vdb-entryx_refsource_SECTRACKBroken LinkThird Party AdvisoryVDB Entry
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04 x_refsource_MISCThird Party AdvisoryUS Government Resource
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05 x_refsource_MISCThird Party AdvisoryUS Government Resource
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr3 x_refsource_CONFIRMVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0174 government-resourceUS Government Resource
- https://www.tenable.com/security/research/tra-2018-06 x_refsource_MISCThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/103554 | vdb-entryx_refsource_BIDBroken LinkThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1040591 | vdb-entryx_refsource_SECTRACKBroken LinkThird Party AdvisoryVDB Entry | |
| https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04 | x_refsource_MISCThird Party AdvisoryUS Government Resource | |
| https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05 | x_refsource_MISCThird Party AdvisoryUS Government Resource | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr3 | x_refsource_CONFIRMVendor Advisory | |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0174 | government-resourceUS Government Resource | |
| https://www.tenable.com/security/research/tra-2018-06 | x_refsource_MISCThird Party Advisory |
Change history (0)
No recorded changes yet.