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01 Record

CVE-2026-76455

Cisco NX-OS Software Security Hardening Release: October 2026 - Improper Access Control Vulnerabilities

CriticalPUBLISHEDCNA: cisco
CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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02 Description

Cisco NX-OS Software Security Hardening Release: October 2026 - Improper Access Control Vulnerabilities

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 ImpacttotalSuccessful exploitation gives total 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
3.59% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 89.3% of scored records. A rank, not a probability.
NVD base score
9.8 (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:U/C:H/I:H/A:H
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 16:15Z21 DAYS AGO
Last updated
2026-10-08 03:55Z21 DAYS AGO
Reserved
2026-08-19
Assigning CNA
cisco
Record state
PUBLISHED
Severity
Critical (CVSS 9.8)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
  • CWE-284Improper Access ControlPillar
Data version
5.2
Document digest
f1cfbdb435530bba33bf4098de1d4d323f40156b45e0c7976d451fb07402393a

05 Affected products

VendorProductVersionsPlatforms
CiscoCisco NX-OS Software8.2(5), 7.3(5)D1(1), 8.4(2), 8.4(3), 9.2(3), 8.2(1), 7.3(1)D1(1), 9.2(2v), 7.3(0)D1(1), 7.3(4)D1(1), 9.2(1), 9.2(2t), 9.2(3y), 9.3(2), 7.3(1)DY(1), 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), 8.3(1), 8.4(1), 8.1(1b), 7.3(0)DX(1), 7.3(2)D1(1), 9.3(1), 7.3(2)D1(2), 8.2(4), 7.3(0)DY(1), 9.3(1z), 9.2(2), 8.1(2a), 7.3(2)D1(3), 8.1(1a), 8.4(1a), 9.3(3), 7.3(2)D1(1d), 9.3(4), 7.3(6)D1(1), 8.2(6), 9.3(5), 8.4(2a), 8.4(2b), 8.5(1), 9.3(6), 8.4(4), 7.3(7)D1(1), 8.4(2c), 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(2d), 8.4(5), 8.2(8), 9.3(9), 7.3(9)D1(1), 8.4(6), 8.4(2e), 9.3(10), 9.2(1a), 8.2(9), 10.3(1), 8.4(7), 10.3(2), 8.4(6a), 9.3(11), 10.3(3), 9.4(1), 9.3(2a), 8.4(2f), 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), 9.4(1a), 10.4(2), 10.3(3q), 9.3(13), 8.2(11), 9.4(2), 10.3(5), 10.4(3), 10.3(3x), 10.3(4g), 10.5(1), 8.4(10), 9.4(2a), 10.3(3r), 10.3(6), 9.3(14), 10.4(4), 10.3(4h), 10.5(2), 10.5(1j), 8.4(11), 9.4(3), 10.3(7), 10.4(5), 10.5(3), 9.3(15), 9.4(3a), 10.4(4g), 10.5(4), 9.4(3b), 8.4(12), 10.6(1), 10.5(3t), 10.3(8), 10.4(6), 10.5(3s), 10.5(3e), 9.4(4), 10.5(3o), 9.3(16), 10.6(1s), 10.6(2), 10.5(3p), 9.4(5), 10.3(9), 10.6(2s), 8.4(13), 10.6(3), 10.4(7), 10.5(5), 9.3(17), 10.6(2n), 10.6(3q), 10.6(3o), 10.6(3s)—
CiscoCisco NX-OS System Software in ACI Mode15.2(1g), 15.2(2e), 15.2(2f), 15.2(2g), 15.2(2h), 15.2(3f), 15.2(3e), 15.2(3g), 15.2(4d), 15.2(4e), 15.2(5c), 15.2(5d), 16.0(1g), 15.2(5e), 15.2(4f), 15.2(6e), 15.2(6h), 16.0(1j), 15.2(6g), 15.2(7f), 15.2(7g), 16.0(2h), 15.2(8d), 16.0(2j), 15.2(8e), 16.0(3d), 16.0(3e), 15.2(8f), 15.2(8g), 15.3(1d), 15.2(8h), 16.0(4c), 15.3(2a), 15.2(8i), 16.0(5h), 15.3(2b), 16.0(3g), 16.0(5j), 15.3(2c), 16.0(6c), 15.3(2d), 16.1(1f), 16.0(7e), 16.0(8e), 15.3(2e), 16.0(8f), 16.1(2f), 16.1(2g), 15.3(2f), 16.0(9c), 16.1(3f), 16.0(9d), 16.0(6h), 16.0(8h), 16.1(3g), 16.0(9e), 16.1(4h), 16.1(5e), 16.2(1g), 16.0(9f), 16.2(2e)—
CiscoCisco Unified Computing System (Managed)4.0(1a), 4.1(1d), 4.0(4f), 4.0(4c), 4.0(2b), 4.1(2a), 4.0(4a), 4.0(4e), 4.0(4h), 4.0(2a), 4.1(1c), 4.0(1b), 4.1(1e), 4.0(4d), 4.0(4b), 4.0(2e), 4.1(1a), 4.0(4g), 4.0(1d), 4.0(1c), 4.0(4i), 4.0(2d), 4.1(1b), 4.1(2b), 4.0(4k), 4.1(3a), 4.1(3b), 4.1(2c), 4.0(4l), 4.1(4a), 4.1(3c), 4.1(3d), 4.2(1c), 4.2(1d), 4.0(4m), 4.1(3e), 4.2(1f), 4.1(3f), 4.2(1i), 4.1(3h), 4.2(1k), 4.2(1l), 4.0(4n), 4.2(1m), 4.1(3i), 4.2(2a), 4.2(1n), 4.1(3j), 4.2(2c), 4.2(2d), 4.2(3b), 4.1(3k), 4.0(4o), 4.2(2e), 4.2(3d), 4.2(3e), 4.2(3g), 4.1(3l), 4.3(2b), 4.2(3h), 4.2(3i), 4.3(2c), 4.1(3m), 4.3(2e), 4.3(3a), 4.2(3j), 4.3(3c), 4.3(4a), 4.2(3k), 4.3(4b), 4.3(4c), 4.2(3l), 4.3(4d), 4.3(2f), 4.2(3m), 4.3(5a), 4.3(4e), 4.1(3n), 4.3(4f), 4.2(3n), 4.3(5c), 4.2(3o), 4.3(5d), 4.3(6a), 4.3(6b), 4.3(5e), 4.3(6c), 4.2(3p), 6.0(1b), 6.0(1c), 4.3(6d), 6.0(1d), 6.0(1e), 4.3(6e), 6.0(1f), 4.3(6f), 6.0(2b), 6.0(1h), 4.2(3r), 6.0(2c), 4.3(6g), 6.0(2d), 4.3(6h), 4.2(3s), 4.3(6i)—

06 References