Cisco IOS XE Software Catalyst 9800 Series Wireless Controllers Denial of Service Vulnerability
Published Jun 3, 2020
8.6
HIGHCVSS 3.1
EPSS 0.84%
Description
A vulnerability in the locally significant certificate (LSC) provisioning feature of Cisco Catalyst 9800 Series Wireless Controllers that are running Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak that could lead to a denial of service (DoS) condition. The vulnerability is due to incorrect processing of certain public key infrastructure (PKI) packets. An attacker could exploit this vulnerability by sending crafted Secure Sockets Layer (SSL) packets to an affected device. A successful exploit could cause an affected device to continuously consume memory, which could result in a memory allocation failure that leads to a crash and causes a DoS condition.
Affected products
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 16.1.1 | n/a |
|
- 16.1.1
- 16.1.2
- 16.1.3
- 16.2.1
- 16.2.2
- 16.3.1
- 16.3.1a
- 16.3.2
- 16.3.3
- 16.3.4
- 16.3.5
- 16.3.5b
- 16.3.6
- 16.3.7
- 16.3.8
- 16.3.9
- 16.4.1
- 16.4.2
- 16.4.3
- 16.5.1
- 16.5.1a
- 16.5.1b
- 16.5.2
- 16.5.3
- 16.7.1
- 16.7.2
- 16.7.3
- 16.8.1
- 16.8.1a
- 16.8.1b
- 16.8.1c
- 16.8.1s
- 16.8.2
- 16.8.3
- 16.10.1
- 16.10.1a
- 16.10.1b
- 16.10.1e
- 16.10.1s
- 16.10.2
- 16.10.3
- 16.11.1
- 16.11.1a
- 16.11.1b
- 16.11.1c
- 16.11.1s
- 16.12.1
- 16.12.1a
- 16.12.1c
- 16.12.1s
- 16.12.2
- 16.12.2a
- 16.12.4
- 16.12.8
Running on/with
- 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Nov 15, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.84% (0.00845) | 56.49th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.84% (0.00845) | 56.42th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.16% (0.00160) | 52.99th | v3 (v2023.03.01) |
| Jun 26, 2024 | 0.16% (0.00160) | 52.79th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.16% (0.00160) | 50.78th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.05% (0.01055) | 52.13th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.05% (0.01055) | 48.43th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.50% (0.04499) | 74.08th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.86% (0.02857) | 63.60th | v1 |
| Jan 6, 2022 | 2.86% (0.02857) | 63.25th | v1 |
| Jan 5, 2022 | 0.65% (0.00651) | 47.22th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.65% (0.00651) | 0.00th | v1 |
References (1)
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-ewlc-dos-TkuPVmZN vendor-advisoryx_refsource_CISCOPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-ewlc-dos-TkuPVmZN | vendor-advisoryx_refsource_CISCOPatchVendor Advisory |
Change history (0)
No recorded changes yet.