Cisco REST API Container for IOS XE Software Authentication Bypass Vulnerability
Published Aug 28, 2019
10.0
CRITICALCVSS 3.0
EPSS 5.32%
Description
A vulnerability in the Cisco REST API virtual service container for Cisco IOS XE Software could allow an unauthenticated, remote attacker to bypass authentication on the managed Cisco IOS XE device. The vulnerability is due to an improper check performed by the area of code that manages the REST API authentication service. An attacker could exploit this vulnerability by submitting malicious HTTP requests to the targeted device. A successful exploit could allow the attacker to obtain the token-id of an authenticated user. This token-id could be used to bypass authentication and execute privileged actions through the interface of the REST API virtual service container on the affected Cisco IOS XE device. The REST API interface is not enabled by default and must be installed and activated separately on IOS XE devices. See the Details section for more information.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<16.09.03
- 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 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Cisco | Cisco IOS XE Software | n/a |
|
Running on/with
- n/a
- n/a
- 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.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
AV:N/AC:L/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 19, 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 (38 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.32% (0.05324) | 92.36th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.32% (0.05324) | 91.53th | v5 (v2026.06.15) |
| Jun 13, 2026 | 19.63% (0.19631) | 95.58th | v4 (v2025.03.14) |
| Mar 18, 2026 | 15.41% (0.15407) | 94.56th | v4 (v2025.03.14) |
| Dec 28, 2025 | 19.63% (0.19631) | 95.22th | v4 (v2025.03.14) |
| Dec 27, 2025 | 16.92% (0.16918) | 94.78th | v4 (v2025.03.14) |
| Nov 21, 2025 | 19.63% (0.19631) | 95.18th | v4 (v2025.03.14) |
| Nov 18, 2025 | 30.73% (0.30728) | 96.47th | v4 (v2025.03.14) |
| Nov 3, 2025 | 19.63% (0.19631) | 95.20th | v4 (v2025.03.14) |
| Nov 1, 2025 | 23.97% (0.23968) | 95.82th | v4 (v2025.03.14) |
| Oct 28, 2025 | 19.63% (0.19631) | 95.16th | v4 (v2025.03.14) |
| Oct 27, 2025 | 16.92% (0.16918) | 94.70th | v4 (v2025.03.14) |
| Oct 24, 2025 | 19.63% (0.19631) | 95.15th | v4 (v2025.03.14) |
| Oct 23, 2025 | 23.97% (0.23968) | 95.77th | v4 (v2025.03.14) |
| Oct 19, 2025 | 19.63% (0.19631) | 95.14th | v4 (v2025.03.14) |
| Oct 18, 2025 | 23.97% (0.23968) | 95.76th | v4 (v2025.03.14) |
| Oct 17, 2025 | 19.63% (0.19631) | 95.14th | v4 (v2025.03.14) |
| Oct 1, 2025 | 23.97% (0.23968) | 95.86th | v4 (v2025.03.14) |
| Jul 30, 2025 | 16.92% (0.16918) | 94.68th | v4 (v2025.03.14) |
| Jul 6, 2025 | 19.63% (0.19631) | 95.13th | v4 (v2025.03.14) |
| Jun 30, 2025 | 15.44% (0.15443) | 94.31th | v4 (v2025.03.14) |
| Mar 30, 2025 | 19.63% (0.19631) | 94.94th | v4 (v2025.03.14) |
| Mar 29, 2025 | 27.37% (0.27371) | 94.26th | v4 (v2025.03.14) |
| Mar 17, 2025 | 19.63% (0.19631) | 94.95th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.74% (0.01743) | 88.43th | v3 (v2023.03.01) |
| Jul 19, 2024 | 1.74% (0.01743) | 88.10th | v3 (v2023.03.01) |
| Oct 7, 2023 | 2.45% (0.02452) | 88.75th | v3 (v2023.03.01) |
| Jul 8, 2023 | 3.43% (0.03434) | 90.16th | v3 (v2023.03.01) |
| May 15, 2023 | 3.50% (0.03498) | 90.15th | v3 (v2023.03.01) |
| Mar 7, 2023 | 4.87% (0.04872) | 91.48th | 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 | 9.03% (0.09029) | 86.86th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.30% (0.02304) | 53.71th | v1 |
| Jan 6, 2022 | 2.30% (0.02304) | 53.25th | v1 |
| Sep 1, 2021 | 0.52% (0.00523) | 32.27th | v1 |
| Apr 14, 2021 | 0.52% (0.00523) | 0.00th | v1 |
References (1)
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-iosxe-rest-auth-bypass vendor-advisoryx_refsource_CISCOVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-iosxe-rest-auth-bypass | vendor-advisoryx_refsource_CISCOVendor Advisory |
Change history (0)
No recorded changes yet.