A vulnerability in the REST API of the web-based user interface (web UI) of Cisco IOS XE 3.1 through 16.5 could allow an unauthenticated, remote attacker to bypass authentication to the REST API of the web UI of the affected software
Published Sep 28, 2017
9.8
CRITICALCVSS 3.0
EPSS 5.17%
Description
A vulnerability in the REST API of the web-based user interface (web UI) of Cisco IOS XE 3.1 through 16.5 could allow an unauthenticated, remote attacker to bypass authentication to the REST API of the web UI of the affected software. The vulnerability is due to insufficient input validation for the REST API of the affected software. An attacker could exploit this vulnerability by sending a malicious API request to an affected device. A successful exploit could allow the attacker to bypass authentication and gain access to the web UI of the affected software. This vulnerability affects Cisco devices that are running a vulnerable release of Cisco IOS XE Software, if the HTTP Server feature is enabled for the device. The newly redesigned, web-based administration UI was introduced in the Denali 16.2 Release of Cisco IOS XE Software. This vulnerability does not affect the web-based administration UI in earlier releases of Cisco IOS XE Software. Cisco Bug IDs: CSCuz46036.
Affected products
- Vendor n/a Product Cisco IOS XE Defaultn/a
- Version Cisco 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 XE | n/a |
|
- 3.1.3as
- 3.2.0ja
- 3.2.1xo
- 3.4.7asg
- 3.6.5be
- 3.8.0ex
- 3.18.3vs
- 16.1.1
- 16.1.2
- 16.1.3
- 16.1.3a
- 16.1.4
- 16.2.1
- 16.2.2a
- 16.3.1a
- 16.5.1a
- 16.5.1c
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:U/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.
No CISA SSVC assessment for this CVE yet.
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 (20 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.17% (0.05167) | 92.18th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.12% (0.05124) | 91.27th | v5 (v2026.06.15) |
| Jul 27, 2025 | 9.26% (0.09258) | 92.36th | v4 (v2025.03.14) |
| Jun 20, 2025 | 15.30% (0.15303) | 94.28th | v4 (v2025.03.14) |
| Mar 30, 2025 | 20.25% (0.20253) | 95.04th | v4 (v2025.03.14) |
| Mar 29, 2025 | 18.95% (0.18952) | 92.30th | v4 (v2025.03.14) |
| Mar 19, 2025 | 20.25% (0.20253) | 94.82th | v4 (v2025.03.14) |
| Mar 17, 2025 | 24.96% (0.24962) | 95.70th | v4 (v2025.03.14) |
| Jul 20, 2024 | 0.44% (0.00439) | 75.08th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.44% (0.00439) | 74.06th | v3 (v2023.03.01) |
| Mar 31, 2023 | 0.44% (0.00439) | 70.90th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.48% (0.00483) | 72.17th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.14% (0.01136) | 59.45th | v2 (v2022.01.01) |
| Oct 18, 2022 | 1.14% (0.01136) | 58.28th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.14% (0.01136) | 56.27th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.14% (0.01136) | 34.23th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.11% (0.01110) | 29.52th | v1 |
| Jan 6, 2022 | 1.11% (0.01110) | 28.89th | v1 |
| Sep 1, 2021 | 1.11% (0.01110) | 66.78th | v1 |
| Apr 14, 2021 | 1.11% (0.01110) | 0.00th | v1 |
References (3)
- http://www.securityfocus.com/bid/101032 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039447 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-restapi x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/101032 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1039447 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-restapi | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.