CVE-2026-76471: Cisco NX-OS Software NX-API Remote Code Execution Vulnerability
- Is it exploited?
Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.
- How likely is exploitation in the next 30 days?
- 0.5%
EPSS score, percentile 41.8 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- 9.8 Critical
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- 9.2(3)
- 9.2(2v)
- 9.2(1)
- 9.2(2t)
- 9.2(3y)
- 9.3(2)
and 18 more in the table below
Source: CISA KEV 2026.10.29, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
What to do
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | 9.2(3) |
| Affected | 9.2(2v) |
| Affected | 9.2(1) |
| Affected | 9.2(2t) |
| Affected | 9.2(3y) |
| Affected | 9.3(2) |
| Affected | 9.2(4) |
| Affected | 9.3(1) |
| Affected | 9.3(1z) |
| Affected | 9.2(2) |
| Affected | 9.3(3) |
| Affected | 9.3(4) |
Versions not listed are: unknown.
And 61 more version entries in the CVE record.
| Status | Versions |
|---|---|
| Affected | 4.0(1a) |
| Affected | 4.1(1d) |
| Affected | 4.0(4f) |
| Affected | 4.0(4a) |
| Affected | 4.0(4e) |
| Affected | 4.0(4c) |
| Affected | 4.0(4h) |
| Affected | 4.1(1c) |
| Affected | 4.0(2a) |
| Affected | 4.1(1e) |
| Affected | 4.1(2a) |
| Affected | 4.0(2b) |
Versions not listed are: unknown.
And 84 more version entries in the CVE record.
Source: CVE List, as of . About the data.
About this vulnerability
A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient input validation of data that is sent to the NX-API. An attacker could exploit this vulnerability by sending a crafted HTTP…
Summary: CVE record, as of .
- CISA has not added CVE-2026-76471 to its Known Exploited Vulnerabilities (KEV) catalog, as of 29 Oct 2026.
- The CVE record was published on 7 Oct 2026.
- The CVE record carries a CVSS v3.1 base score of 9.8 (Critical), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.5% (percentile 41.8), as of 29 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
- CISA's SSVC assessment in the CVE record: exploitation none, automatable yes, technical impact total.
Source: CISA KEV 2026.10.29, as of ; CVE List, as of ; FIRST EPSS, as of . About the data.
Description
Cisco NX-OS Software NX-API Remote Code Execution Vulnerability
A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient input validation of data that is sent to the NX-API. An attacker could exploit this vulnerability by sending a crafted HTTP request to the NX-API of an affected device. A successful exploit could allow the attacker to execute arbitrary code with root privileges and could cause process crashes, which could result in a reload of the device and a DoS condition.
Source: CVE List, as of . About the data.
Weakness
CWE-122
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| CVE record last updated |
References
1
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