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CVE Record

CVE-2026-76500: Cisco Application Policy Infrastructure Controller Hardening Release: October 2026 - Improper Control of a Resource Through its Lifetime Vulnerabilities

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.

CriticalCVSS 9.8Not KEV-listedUpdated
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Potential ATT&CK relevance

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CWE-664: Exact CWE lookup

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CVE-2026-76500 mapping review

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
1ADP providers
2Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: total

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9.8CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9cisco

Vulnerability scoring details

Base CVSS 3.1 score

9.8Critical
CVSS 3.1 vector shape for CVE-2026-76500Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

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  3. CVE updatedCVE Program

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ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
CiscoCisco Application Policy Infrastructure Controller (APIC)5.2(1g), 5.2(2e), 5.2(2f), 5.2(2g), 5.2(2h), 5.2(3f), 5.2(3e), 5.2(3g), 5.2(4d), 5.2(4e), 5.2(5d), 5.2(5c), 6.0(1g), 5.2(5e), 5.2(4f), 5.2(6e), 6.0(1j), 5.2(6g), 5.2(7f), 5.2(7g), 6.0(2h), 5.2(6h), 5.2(4h), 5.2(8d), 6.0(2j), 5.2(8e), 6.0(3d), 6.0(3e), 5.2(8f), 5.2(8g), 5.3(1d), 5.2(8h), 6.0(4c), 5.3(2a), 5.2(8i), 6.0(5h), 5.3(2b), 6.0(3g), 6.0(5j), 5.3(2c), 6.0(6c), 6.1(1f), 6.0(7e), 5.3(2d), 6.0(8d), 6.0(8e), 6.1(2f), 6.0(8f), 5.3(2e), 6.1(2g), 5.3(2f), 6.0(9c), 6.1(3f), 6.0(9d), 6.0(6g), 6.0(6h), 6.0(8h), 6.1(3g), 6.1(4h), 6.0(9e), 6.1(5e), 6.2(1f), 6.2(1g), 6.0(9f), 6.2(2e)unknown
Weakness

CWE details

CWE-664

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CWE-664 · source CWE mapping

Improper Control of a Resource Through its Lifetime

Improper Control of a Resource Through its Lifetime represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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