HIGH
A vulnerability in the Cisco ACI Multi-Site CloudSec encryption feature of Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an unauthenticated, remote attacker to read or modify intersite encrypted traffic
Published Jul 12, 2023
7.4
HIGHCVSS 3.1
EPSS 0.34%
Description
A vulnerability in the Cisco ACI Multi-Site CloudSec encryption feature of Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an unauthenticated, remote attacker to read or modify intersite encrypted traffic. This vulnerability is due to an issue with the implementation of the ciphers that are used by the CloudSec encryption feature on affected switches. An attacker with an on-path position between the ACI sites could exploit this vulnerability by intercepting intersite encrypted traffic and using cryptanalytic techniques to break the encryption. A successful exploit could allow the attacker to read or modify the traffic that is transmitted between the sites. Cisco has not released and will not release software updates that address this vulnerability.
Affected products
-
- Version 14.0(1h)StatusaffectedConstraints-
- Version 14.0(2c)StatusaffectedConstraints-
- Version 14.0(3c)StatusaffectedConstraints-
- Version 14.0(3d)StatusaffectedConstraints-
- Version 14.1(1i)StatusaffectedConstraints-
- Version 14.1(1j)StatusaffectedConstraints-
- Version 14.1(1k)StatusaffectedConstraints-
- Version 14.1(1l)StatusaffectedConstraints-
- Version 14.1(2g)StatusaffectedConstraints-
- Version 14.1(2m)StatusaffectedConstraints-
- Version 14.1(2o)StatusaffectedConstraints-
- Version 14.1(2s)StatusaffectedConstraints-
- Version 14.1(2u)StatusaffectedConstraints-
- Version 14.1(2w)StatusaffectedConstraints-
- Version 14.1(2x)StatusaffectedConstraints-
- Version 14.2(1i)StatusaffectedConstraints-
- Version 14.2(1j)StatusaffectedConstraints-
- Version 14.2(1l)StatusaffectedConstraints-
- Version 14.2(2e)StatusaffectedConstraints-
- Version 14.2(2f)StatusaffectedConstraints-
- Version 14.2(2g)StatusaffectedConstraints-
- Version 14.2(3j)StatusaffectedConstraints-
- Version 14.2(3l)StatusaffectedConstraints-
- Version 14.2(3n)StatusaffectedConstraints-
- Version 14.2(3q)StatusaffectedConstraints-
- Version 14.2(4i)StatusaffectedConstraints-
- Version 14.2(4k)StatusaffectedConstraints-
- Version 14.2(4o)StatusaffectedConstraints-
- Version 14.2(4p)StatusaffectedConstraints-
- Version 14.2(5k)StatusaffectedConstraints-
- Version 14.2(5l)StatusaffectedConstraints-
- Version 14.2(5n)StatusaffectedConstraints-
- Version 14.2(6d)StatusaffectedConstraints-
- Version 14.2(6g)StatusaffectedConstraints-
- Version 14.2(6h)StatusaffectedConstraints-
- Version 14.2(6l)StatusaffectedConstraints-
- Version 14.2(6o)StatusaffectedConstraints-
- Version 14.2(7f)StatusaffectedConstraints-
- Version 14.2(7l)StatusaffectedConstraints-
- Version 14.2(7q)StatusaffectedConstraints-
- Version 14.2(7r)StatusaffectedConstraints-
- Version 14.2(7s)StatusaffectedConstraints-
- Version 14.2(7t)StatusaffectedConstraints-
- Version 14.2(7u)StatusaffectedConstraints-
- Version 14.2(7v)StatusaffectedConstraints-
- Version 14.2(7w)StatusaffectedConstraints-
- Version 15.0(1k)StatusaffectedConstraints-
- Version 15.0(1l)StatusaffectedConstraints-
- Version 15.0(2e)StatusaffectedConstraints-
- Version 15.0(2h)StatusaffectedConstraints-
- Version 15.1(1h)StatusaffectedConstraints-
- Version 15.1(2e)StatusaffectedConstraints-
- Version 15.1(3e)StatusaffectedConstraints-
- Version 15.1(4c)StatusaffectedConstraints-
- Version 15.2(1g)StatusaffectedConstraints-
- Version 15.2(2e)StatusaffectedConstraints-
- Version 15.2(2f)StatusaffectedConstraints-
- Version 15.2(2g)StatusaffectedConstraints-
- Version 15.2(2h)StatusaffectedConstraints-
- Version 15.2(3e)StatusaffectedConstraints-
- Version 15.2(3f)StatusaffectedConstraints-
- Version 15.2(3g)StatusaffectedConstraints-
- Version 15.2(4d)StatusaffectedConstraints-
- Version 15.2(4e)StatusaffectedConstraints-
- Version 15.2(4f)StatusaffectedConstraints-
- Version 15.2(5c)StatusaffectedConstraints-
- Version 15.2(5d)StatusaffectedConstraints-
- Version 15.2(5e)StatusaffectedConstraints-
- Version 15.2(6e)StatusaffectedConstraints-
- Version 15.2(6g)StatusaffectedConstraints-
- Version 15.2(7f)StatusaffectedConstraints-
- Version 15.2(7g)StatusaffectedConstraints-
- Version 15.2(8d)StatusaffectedConstraints-
- Version 15.2(8e)StatusaffectedConstraints-
- Version 15.2(8f)StatusaffectedConstraints-
- Version 15.2(8g)StatusaffectedConstraints-
- Version 15.2(8h)StatusaffectedConstraints-
- Version 15.3(1d)StatusaffectedConstraints-
- Version 16.0(1g)StatusaffectedConstraints-
- Version 16.0(1j)StatusaffectedConstraints-
- Version 16.0(2h)StatusaffectedConstraints-
- Version 16.0(2j)StatusaffectedConstraints-
- Version 16.0(3d)StatusaffectedConstraints-
- Version 16.0(3e)StatusaffectedConstraints-
- 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 NX-OS System Software in ACI Mode | n/a |
|
AND
OR
- 14.0\(1h\)
- 14.0\(2c\)
- 14.0\(3c\)
- 14.0\(3d\)
- 14.1\(1i\)
- 14.1\(1j\)
- 14.1\(1k\)
- 14.1\(1l\)
- 14.1\(2g\)
- 14.1\(2m\)
- 14.1\(2o\)
- 14.1\(2s\)
- 14.1\(2u\)
- 14.1\(2w\)
- 14.1\(2x\)
- 14.2\(1i\)
- 14.2\(1j\)
- 14.2\(1l\)
- 14.2\(2e\)
- 14.2\(2f\)
- 14.2\(2g\)
- 14.2\(3j\)
- 14.2\(3l\)
- 14.2\(3n\)
- 14.2\(3q\)
- 14.2\(4i\)
- 14.2\(4k\)
- 14.2\(4o\)
- 14.2\(4p\)
- 14.2\(5k\)
- 14.2\(5l\)
- 14.2\(5n\)
- 14.2\(6d\)
- 14.2\(6g\)
- 14.2\(6h\)
- 14.2\(6l\)
- 14.2\(6o\)
- 14.2\(7f\)
- 14.2\(7l\)
- 14.2\(7q\)
- 14.2\(7r\)
- 14.2\(7s\)
- 14.2\(7t\)
- 14.2\(7u\)
- 14.2\(7v\)
- 14.2\(7w\)
- 15.0\(1k\)
- 15.0\(1l\)
- 15.0\(2e\)
- 15.0\(2h\)
- 15.1\(1h\)
- 15.1\(2e\)
- 15.1\(3e\)
- 15.1\(4c\)
- 15.2\(1g\)
- 15.2\(2e\)
- 15.2\(2f\)
- 15.2\(2g\)
- 15.2\(2h\)
- 15.2\(3e\)
- 15.2\(3f\)
- 15.2\(3g\)
- 15.2\(4d\)
- 15.2\(4e\)
- 15.2\(4f\)
- 15.2\(5c\)
- 15.2\(5d\)
- 15.2\(5e\)
- 15.2\(6e\)
- 15.2\(6g\)
- 15.2\(7f\)
- 15.2\(7g\)
- 15.2\(8d\)
- 16.0\(1g\)
- 16.0\(1j\)
- 16.0\(2h\)
Running on/with
- 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.
7.4 HIGH NVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact None
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.
0.34% 0.00343
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.00343
Score over time
2023–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (7 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.34% (0.00343) | 25.54th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.33% (0.00327) | 24.23th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.13% (0.00130) | 29.95th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.10% (0.00095) | 41.66th | v3 (v2023.03.01) |
| Jul 18, 2024 | 0.10% (0.00096) | 40.67th | v3 (v2023.03.01) |
| Jul 14, 2023 | 0.08% (0.00077) | 31.60th | v3 (v2023.03.01) |
| Jul 13, 2023 | 0.05% (0.00048) | 14.83th | v3 (v2023.03.01) |
References (1)
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner cisco
Published Jul 12, 2023
Updated Aug 2, 2024
Reserved Oct 27, 2022
Link CVE-2023-20185
CISA Vulnrichment
Updated n/a