CVE-2026-76453
CVE-2026-76453 is covered by the cisco-sa-hardening-nxosw1-cWzSbtR security bulletin. Not in the CISA KEV catalog. Critical advisory severity.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
CVE-2026-76453 at a glance
- CISA KEV
- Not listed (catalog checked )
- Highest advisory severity
- Critical
- Vendor advisories
- 2 from Cisco
- VulniPulse record
- Published · Updated
Is CVE-2026-76453 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-76453 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-76453?
This CVE is tracked through a multi-CVE bulletin, so its fixed releases may differ from the bulletin-wide values below. Check the vendor source.
Vendor advisory comparison
Cisco
2 advisories- Advisory severityCritical9.8
Critical [CVE-2026-76453 +5] Cisco NX-OS Software Security Hardening Release: October 2026
cisco-sa-hardening-nxosw1-cWzSbtRSource published Source updated
This bulletin covers 6 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco NX-OS Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. These vulnerabilities were found during internal testing and are not known to be actively exploited. To assist customers in patching and streamline the disclosure process, Cisco has grouped these issues by their underlying vulnerability class — Common Weakness Enumeration (CWE) — and assigned a single Common Vulnerabilities and Exposures identifier (CVE ID). Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.
- Affected products in this advisory
- NX-OS System Software in ACI Mode
- Unified Computing System (Managed)
- NX-OS Software
- Source-reported affected versions
- Scope: These vulnerabilities affect the following Cisco products if they are running a vulnerable release of Cisco NX-OS Software, regardless of device configuration:
- 9.3 and earlier — Migrate to a fixed release
- Release 9.4 (first fixed: 9.4(5a))
- Release 10.3 and earlier (first fixed: 10.3(10))
11 more entries in the full advisory.
- Source-reported fixed versions
- 9.4(5a)
- 10.3(10)
- 10.4(8)
- 10.5(6)
7 more entries in the full advisory.
- Mitigation guidance
- Upgrade to the first fixed release for your train per the Fixed Releases table in this advisory.
- Release 9.3 and earlier: migrate to a fixed release.
- Release 9.4: upgrade to 9.4(5a).
- Release 10.3 and earlier: upgrade to 10.3(10).
5 more entries in the full advisory.
- Workarounds
- There are no workarounds that address these vulnerabilities.
- Advisory severityUnrated
Advisory [CVE-2026-20032 +13] Cisco Advance Notification for Publication of October 7, 2026, Security Advisories
cisco-sa-notice-fBn58ELxSource published Source updated
This bulletin covers 14 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.
On October 7, 2026, the Cisco Product Security Incident Response Team (PSIRT) published the advisories that are listed in the following tables. To remediate the vulnerabilities that were disclosed on October 7, 2026, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the Foundation: A Predictable, Customer-Focused Response to AI-Accelerated Vulnerability Discovery. Cisco Security Advisory CVE ID Security Impact Rating CVSS Base Score Cisco NX-OS Software Security Hardening Release: October 2026 Critical 9.8 Cisco Nexus 3000 and 9000 Series Switches MPLS OAM Remote Code Execution Vulnerability Cisco NX-OS Software NX-API Remote Code…
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- To remediate the vulnerabilities that were disclosed on October 7, 2026, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories.
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