Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software WebVPN Denial of Service Vulnerability
Published May 3, 2019
6.5
MEDIUMCVSS 3.1
EPSS 2.03%
Description
A vulnerability in the WebVPN service of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper management of authenticated sessions in the WebVPN portal. An attacker could exploit this vulnerability by authenticating with valid credentials and accessing a specific URL in the WebVPN portal. A successful exploit could allow the attacker to cause the device to reload, resulting in a temporary DoS condition.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<9.10.1.17
- Version unspecifiedStatusaffectedConstraints<9.4.4.34
- Version unspecifiedStatusaffectedConstraints<9.6.4.25
- Version unspecifiedStatusaffectedConstraints<9.8.4
- Version unspecifiedStatusaffectedConstraints<9.9.2.50
- Version
-
- Version unspecifiedStatusaffectedConstraints<6.2.3.12
- Version unspecifiedStatusaffectedConstraints<6.3.0.3
- 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 Adaptive Security Appliance (ASA) Software | n/a |
| ||||||||||||||||||
| Cisco | Cisco Firepower Threat Defense (FTD) Software | n/a |
|
Configuration 1
- < 9.4.4.34
- ≥ 9.5 · < 9.6.4.25
- ≥ 9.7 · < 9.8.4
- ≥ 9.9 · < 9.9.2.50
- ≥ 9.10 · < 9.10.1.17
Running on/with
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
Configuration 2
- ≥ 6.2.1 · < 6.2.3.12
- ≥ 6.3.0 · < 6.3.0.3
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:L/UI:N/S:U/C:N/I:N/A:H
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
AV:N/AC:L/Au:S/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
NoTechnical Impact
PartialDecision
n/aAssessed Nov 21, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 2.03% (0.02028) | 80.35th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.07% (0.02067) | 78.85th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.11% (0.00109) | 44.49th | v3 (v2023.03.01) |
| Jun 20, 2024 | 0.11% (0.00109) | 44.26th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.11% (0.00109) | 42.24th | 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) |
| Mar 31, 2022 | 5.46% (0.05463) | 77.11th | v2 (v2022.01.01) |
| Jan 6, 2022 | 4.49% (0.04490) | 74.82th | v1 |
| Jan 5, 2022 | 1.04% (0.01037) | 63.76th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.04% (0.01037) | 0.00th | v1 |
References (2)
- http://www.securityfocus.com/bid/108157 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-asa-ftd-dos vendor-advisoryx_refsource_CISCOVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/108157 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-asa-ftd-dos | vendor-advisoryx_refsource_CISCOVendor Advisory |
Change history (0)
No recorded changes yet.