CVE-2026-76500 - Vulnerability Details

- Cisco Application Policy Infrastructure Controller Hardening Release: October 2026 - Improper Control of a Resource Through its Lifetime Vulnerabilities

Description

As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Application Policy Infrastructure Controller (APIC) engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.  

The vulnerabilities tracked by CVE-2026-76500 are related to issues with improper control of a resource through its lifetime that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-664.

Published: 2026-10-07

Score: 9.8 Critical

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

The vulnerability permits improper control of a resource through its lifetime, which could allow attackers to manipulate resource behavior, potentially leading to unauthorized modification, system instability, or denial of service. The high CVSS score of 9.8 signals a severe impact.

Affected Systems

Cisco Application Policy Infrastructure Controller (APIC) is affected; specific affected versions are not listed.

Risk and Exploitability

The CVSS score of 9.8 indicates the severity of the issue, but the EPSS score is not available, so the exploitation probability is unknown. The vulnerability is not in CISA's KEV catalog. Based on the description, it is inferred that an attacker could exploit the flaw through the APIC management interface, which is typically network‑exposed.

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 Application Policy Infrastructure Controller (APIC)

unknown

Version	Status	Constraints
`5.2(1g)`	affected	—
`5.2(2e)`	affected	—
`5.2(2f)`	affected	—
`5.2(2g)`	affected	—
`5.2(2h)`	affected	—
`5.2(3f)`	affected	—
`5.2(3e)`	affected	—
`5.2(3g)`	affected	—
`5.2(4d)`	affected	—
`5.2(4e)`	affected	—
`5.2(5d)`	affected	—
`5.2(5c)`	affected	—
`6.0(1g)`	affected	—
`5.2(5e)`	affected	—
`5.2(4f)`	affected	—
`5.2(6e)`	affected	—
`6.0(1j)`	affected	—
`5.2(6g)`	affected	—
`5.2(7f)`	affected	—
`5.2(7g)`	affected	—
`6.0(2h)`	affected	—
`5.2(6h)`	affected	—
`5.2(4h)`	affected	—
`5.2(8d)`	affected	—
`6.0(2j)`	affected	—
`5.2(8e)`	affected	—
`6.0(3d)`	affected	—
`6.0(3e)`	affected	—
`5.2(8f)`	affected	—
`5.2(8g)`	affected	—
`5.3(1d)`	affected	—
`5.2(8h)`	affected	—
`6.0(4c)`	affected	—
`5.3(2a)`	affected	—
`5.2(8i)`	affected	—
`6.0(5h)`	affected	—
`5.3(2b)`	affected	—
`6.0(3g)`	affected	—
`6.0(5j)`	affected	—
`5.3(2c)`	affected	—
`6.0(6c)`	affected	—
`6.1(1f)`	affected	—
`6.0(7e)`	affected	—
`5.3(2d)`	affected	—
`6.0(8d)`	affected	—
`6.0(8e)`	affected	—
`6.1(2f)`	affected	—
`6.0(8f)`	affected	—
`5.3(2e)`	affected	—
`6.1(2g)`	affected	—
`5.3(2f)`	affected	—
`6.0(9c)`	affected	—
`6.1(3f)`	affected	—
`6.0(9d)`	affected	—
`6.0(6g)`	affected	—
`6.0(6h)`	affected	—
`6.0(8h)`	affected	—
`6.1(3g)`	affected	—
`6.1(4h)`	affected	—
`6.0(9e)`	affected	—
`6.1(5e)`	affected	—
`6.2(1f)`	affected	—
`6.2(1g)`	affected	—
`6.0(9f)`	affected	—
`6.2(2e)`	affected	—

No data.

Vendor Product Confidence Versions

Cisco

Application Policy Infrastructure Controller (apic)

95%

Version	Status	Scheme	Platform
`5.2(1g)`	affected	generic	—
`5.2(2e)`	affected	generic	—
`5.2(2f)`	affected	generic	—
`5.2(2g)`	affected	generic	—
`5.2(2h)`	affected	generic	—
`5.2(3f)`	affected	generic	—
`5.2(3e)`	affected	generic	—
`5.2(3g)`	affected	generic	—
`5.2(4d)`	affected	generic	—
`5.2(4e)`	affected	generic	—
`5.2(5d)`	affected	generic	—
`5.2(5c)`	affected	generic	—
`6.0(1g)`	affected	generic	—
`5.2(5e)`	affected	generic	—
`5.2(4f)`	affected	generic	—
`5.2(6e)`	affected	generic	—
`6.0(1j)`	affected	generic	—
`5.2(6g)`	affected	generic	—
`5.2(7f)`	affected	generic	—
`5.2(7g)`	affected	generic	—
`6.0(2h)`	affected	generic	—
`5.2(6h)`	affected	generic	—
`5.2(4h)`	affected	generic	—
`5.2(8d)`	affected	generic	—
`6.0(2j)`	affected	generic	—
`5.2(8e)`	affected	generic	—
`6.0(3d)`	affected	generic	—
`6.0(3e)`	affected	generic	—
`5.2(8f)`	affected	generic	—
`5.2(8g)`	affected	generic	—
`5.3(1d)`	affected	generic	—
`5.2(8h)`	affected	generic	—
`6.0(4c)`	affected	generic	—
`5.3(2a)`	affected	generic	—
`5.2(8i)`	affected	generic	—
`6.0(5h)`	affected	generic	—
`5.3(2b)`	affected	generic	—
`6.0(3g)`	affected	generic	—
`6.0(5j)`	affected	generic	—
`5.3(2c)`	affected	generic	—
`6.0(6c)`	affected	generic	—
`6.1(1f)`	affected	generic	—
`6.0(7e)`	affected	generic	—
`5.3(2d)`	affected	generic	—
`6.0(8d)`	affected	generic	—
`6.0(8e)`	affected	generic	—
`6.1(2f)`	affected	generic	—
`6.0(8f)`	affected	generic	—
`5.3(2e)`	affected	generic	—
`6.1(2g)`	affected	generic	—
`5.3(2f)`	affected	generic	—
`6.0(9c)`	affected	generic	—
`6.1(3f)`	affected	generic	—
`6.0(9d)`	affected	generic	—
`6.0(6g)`	affected	generic	—
`6.0(6h)`	affected	generic	—
`6.0(8h)`	affected	generic	—
`6.1(3g)`	affected	generic	—
`6.1(4h)`	affected	generic	—
`6.0(9e)`	affected	generic	—
`6.1(5e)`	affected	generic	—
`6.2(1f)`	affected	generic	—
`6.2(1g)`	affected	generic	—
`6.0(9f)`	affected	generic	—
`6.2(2e)`	affected	generic	—

Found an issue or want to improve our Enrichment? You can suggest it directly by opening an issue on our dedicated GitHub repository .

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Apply the Cisco APIC hardening release that includes the fix for the resource control issue.
Restrict management interface access to trusted IP ranges and enforce strong authentication.
Remove or disable any unused services or interfaces on the APIC.
Monitor APIC logs for anomalous activity and conduct periodic vulnerability scans.

Generated by OpenCVE AI on October 7, 2026 at 18:38 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00325.

Exploitation none

Automatable yes

Technical Impact total

References

Link	Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-apic-UOXWtfh

History

Fri, 09 Oct 2026 07:45:00 +0000

Type	Values Removed	Values Added
First Time appeared		Cisco Cisco application Policy Infrastructure Controller (apic)
Vendors & Products		Cisco Cisco application Policy Infrastructure Controller (apic)

Thu, 08 Oct 2026 17:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Wed, 07 Oct 2026 16:30:00 +0000

Type	Values Removed	Values Added
Description		As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco Application Policy Infrastructure Controller (APIC) engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.   The vulnerabilities tracked by CVE-2026-76500 are related to issues with improper control of a resource through its lifetime that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-664.
Title		Cisco Application Policy Infrastructure Controller Hardening Release: October 2026 - Improper Control of a Resource Through its Lifetime Vulnerabilities
Weaknesses		CWE-664
References		https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-apic-UOXWtfh
Metrics		cvssV3_1 `{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}`

Subscriptions

Cisco Application Policy Infrastructure Controller (apic)

MITRE

Status: PUBLISHED

Assigner: cisco

Published: 2026-10-07T16:17:34.991Z

Updated: 2026-10-08T15:31:11.161Z

Reserved: 2026-08-19T12:02:03.641Z

Link: CVE-2026-76500

Vulnrichment

Updated: 2026-10-08T15:31:06.597Z

NVD

Status : Awaiting Analysis

Published: 2026-10-07T17:17:01.963

Modified: 2026-10-08T20:08:45.857

Link: CVE-2026-76500

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-10-09T07:30:17Z

Weaknesses

CWE-664
Improper Control of a Resource Through its Lifetime

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Exploitation none

Automatable yes

Technical Impact total

Subscriptions

JSON object

JSON object

JSON object

JSON object

JSON object