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01 Record

CVE-2026-20173

Cisco NX-OS Software Denial of Service Vulnerability

MediumPUBLISHEDCNA: cisco
CNA base score5.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
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02 Description

Cisco NX-OS Software Denial of Service Vulnerability

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.37% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 30.9% of scored records. A rank, not a probability.
NVD base score
5.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-10-08.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-07 16:12Z22 DAYS AGO
Last updated
2026-10-07 17:42Z22 DAYS AGO
Reserved
2025-10-08
Assigning CNA
cisco
Record state
PUBLISHED
Severity
Medium (CVSS 5.8)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Weaknesses
  • CWE-770Allocation of Resources Without Limits or ThrottlingBase
Data version
5.2
Document digest
e0b4565bd580dae7e18fd14bc5431c5f170179779d54bce7e2b43ad5da29f38b

05 Affected products

VendorProductVersionsPlatforms
CiscoCisco NX-OS Software8.2(5), 7.3(5)D1(1), 8.4(2), 8.4(3), 9.2(3), 9.2(2v), 7.3(4)D1(1), 8.2(1), 9.2(1), 9.2(2t), 9.2(3y), 9.3(2), 8.1(1), 8.2(2), 8.3(2), 7.3(2)D1(3a), 9.2(4), 8.1(2), 7.3(3)D1(1), 8.2(3), 8.4(1), 7.3(0)DX(1), 7.3(2)D1(1), 9.3(1), 7.3(2)D1(2), 8.2(4), 9.3(1z), 9.2(2), 8.1(2a), 7.3(2)D1(3), 8.3(1), 7.3(1)D1(1), 7.3(0)D1(1), 9.3(3), 7.3(2)D1(1d), 9.3(4), 7.3(6)D1(1), 8.2(6), 9.3(5), 9.3(6), 8.4(4), 7.3(7)D1(1), 9.3(5w), 8.2(7), 9.3(7), 9.3(7k), 7.3(8)D1(1), 9.3(7a), 8.2(7a), 9.3(8), 8.4(4a), 8.4(5), 8.2(8), 9.3(9), 7.3(9)D1(1), 8.4(6), 9.3(10), 8.2(9), 10.3(1), 8.4(7), 10.3(2), 8.4(6a), 9.3(11), 10.3(3), 8.2(10), 9.3(12), 10.4(1), 8.4(8), 10.3(99w), 10.3(3w), 10.3(99x), 10.3(3o), 8.4(9), 10.3(4), 10.3(3p), 10.3(4a), 10.4(2), 10.3(3q), 9.3(13), 8.2(11), 10.3(5), 10.4(3), 10.3(3x), 10.3(4g), 10.5(1), 8.4(10), 10.3(3r), 10.3(6), 9.3(14), 10.4(4), 10.3(4h), 10.5(2), 8.4(11), 10.3(7), 10.4(5), 10.5(3), 9.3(15), 10.4(4g), 10.5(4), 8.4(12), 10.5(3t), 10.3(8), 10.4(6), 10.5(3s), 10.5(3e), 10.5(3o), 9.3(16), 10.5(3p), 10.4(7), 10.5(5), 9.3(17)—

06 References