A vulnerability in the hardware-based SSL/TLS cryptography functionality of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series Appliances could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition
Published Jun 28, 2023
8.6
HIGHCVSS 3.1
EPSS 0.92%
Description
A vulnerability in the hardware-based SSL/TLS cryptography functionality of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series Appliances could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to an implementation error within the cryptographic functions for SSL/TLS traffic processing when they are offloaded to the hardware. An attacker could exploit this vulnerability by sending a crafted stream of SSL/TLS traffic to an affected device. A successful exploit could allow the attacker to cause an unexpected error in the hardware-based cryptography engine, which could cause the device to reload.
Affected products
-
- Version 9.16.4StatusaffectedConstraints-
- Version 9.18.2StatusaffectedConstraints-
- Version 9.18.2.5StatusaffectedConstraints-
- Version
-
- Version 7.2.1StatusaffectedConstraints-
- Version 7.2.2StatusaffectedConstraints-
- Version 7.2.3StatusaffectedConstraints-
- 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 Software | n/a |
|
- 7.2.1
- 7.2.2
- 7.2.3
- 9.16.4
- 9.18.2
- 9.18.2.5
Running on/with
- 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:U/C:N/I:N/A:H
1 other source (CVE.org) ▾
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
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
2023–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (8 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.92% (0.00919) | 58.81th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.92% (0.00919) | 55.41th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.60% (0.00599) | 67.56th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.09% (0.00092) | 41.05th | v3 (v2023.03.01) |
| Jul 4, 2024 | 0.08% (0.00083) | 35.78th | v3 (v2023.03.01) |
| Jun 21, 2024 | 0.06% (0.00063) | 26.92th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.06% (0.00063) | 24.90th | v3 (v2023.03.01) |
| Jun 29, 2023 | 0.05% (0.00048) | 14.81th | v3 (v2023.03.01) |
References (1)
Change history (0)
No recorded changes yet.