A vulnerability in the authentication, authorization, and accounting (AAA) security services of Cisco IOS XE Software could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device or cause an affected device to reload, resulting in a denial of service (DoS) condition
Published Jun 7, 2018
9.8
CRITICALCVSS 3.1
EPSS 7.77%
Description
A vulnerability in the authentication, authorization, and accounting (AAA) security services of Cisco IOS XE Software could allow an unauthenticated, remote attacker to execute arbitrary code on an affected device or cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to incorrect memory operations that the affected software performs when the software parses a username during login authentication. An attacker could exploit this vulnerability by attempting to authenticate to an affected device. A successful exploit could allow the attacker to execute arbitrary code on the affected device or cause the affected device to reload, resulting in a DoS condition. This vulnerability affects Cisco devices that are running Cisco IOS XE Software Release Fuji 16.7.1 or Fuji 16.8.1 and are configured to use AAA for login authentication. Cisco Bug IDs: CSCvi25380.
Affected products
- Vendor n/a Product Cisco IOS XE unknown Defaultn/a
- Version Cisco IOS XE unknownStatusaffectedConstraints-
- 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 XE unknown | 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:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Nov 29, 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 (26 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 7.77% (0.07774) | 94.47th | v5 (v2026.06.15) |
| Jun 15, 2026 | 8.07% (0.08074) | 94.05th | v5 (v2026.06.15) |
| Mar 17, 2026 | 9.46% (0.09465) | 92.73th | v4 (v2025.03.14) |
| Dec 27, 2025 | 14.47% (0.14467) | 94.25th | v4 (v2025.03.14) |
| Nov 21, 2025 | 15.58% (0.15583) | 94.41th | v4 (v2025.03.14) |
| Nov 18, 2025 | 9.91% (0.09912) | 92.22th | v4 (v2025.03.14) |
| Jul 30, 2025 | 15.10% (0.15102) | 94.29th | v4 (v2025.03.14) |
| Mar 30, 2025 | 16.15% (0.16154) | 94.24th | v4 (v2025.03.14) |
| Mar 29, 2025 | 20.48% (0.20477) | 92.76th | v4 (v2025.03.14) |
| Mar 17, 2025 | 16.41% (0.16406) | 94.36th | v4 (v2025.03.14) |
| Dec 17, 2024 | 2.39% (0.02387) | 89.56th | v3 (v2023.03.01) |
| May 17, 2024 | 4.40% (0.04401) | 92.35th | v3 (v2023.03.01) |
| Apr 16, 2024 | 4.47% (0.04471) | 92.31th | v3 (v2023.03.01) |
| Dec 8, 2023 | 3.14% (0.03135) | 90.02th | v3 (v2023.03.01) |
| Oct 29, 2023 | 3.43% (0.03433) | 90.41th | v3 (v2023.03.01) |
| Jul 8, 2023 | 4.46% (0.04465) | 91.27th | v3 (v2023.03.01) |
| Jun 1, 2023 | 3.54% (0.03539) | 90.22th | v3 (v2023.03.01) |
| Mar 7, 2023 | 3.68% (0.03681) | 90.31th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.79% (0.03795) | 85.54th | v2 (v2022.01.01) |
| Mar 4, 2023 | 3.79% (0.03795) | 85.54th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.69% (0.03693) | 83.51th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.69% (0.03693) | 66.67th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.27% (0.02269) | 50.81th | v1 |
| Jan 6, 2022 | 2.27% (0.02269) | 50.31th | v1 |
| Sep 1, 2021 | 2.27% (0.02269) | 77.69th | v1 |
| Apr 14, 2021 | 2.27% (0.02269) | 0.00th | v1 |
References (3)
- http://www.securityfocus.com/bid/104410 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041086 vdb-entryx_refsource_SECTRACKBroken LinkThird Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-aaa x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/104410 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1041086 | vdb-entryx_refsource_SECTRACKBroken LinkThird Party AdvisoryVDB Entry | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-aaa | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.