CVE-2026-76499 (GCVE-0-2026-76499)

Vulnerability from cvelistv5 – Published: 2026-10-07 16:17 – Updated: 2026-10-07 17:48
VLAI
Title
Cisco Application Policy Infrastructure Controller Hardening Release: October 2026 - Improper Neutralization Vulnerabilities
Summary
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-2026-76499 are related to improper neutralization issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-707.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 17:47 UTC
CWE
  • CWE-707 - Improper Neutralization
Impacted products
Vendor Product Version CPE status
Cisco Cisco Application Policy Infrastructure Controller (APIC) Affected: 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)
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                  "status": "affected",
                  "version": "5.2(4e)"
                },
                {
                  "status": "affected",
                  "version": "5.2(5d)"
                },
                {
                  "status": "affected",
                  "version": "5.2(5c)"
                },
                {
                  "status": "affected",
                  "version": "6.0(1g)"
                },
                {
                  "status": "affected",
                  "version": "5.2(5e)"
                },
                {
                  "status": "affected",
                  "version": "5.2(4f)"
                },
                {
                  "status": "affected",
                  "version": "5.2(6e)"
                },
                {
                  "status": "affected",
                  "version": "6.0(1j)"
                },
                {
                  "status": "affected",
                  "version": "5.2(6g)"
                },
                {
                  "status": "affected",
                  "version": "5.2(7f)"
                },
                {
                  "status": "affected",
                  "version": "5.2(7g)"
                },
                {
                  "status": "affected",
                  "version": "6.0(2h)"
                },
                {
                  "status": "affected",
                  "version": "5.2(6h)"
                },
                {
                  "status": "affected",
                  "version": "5.2(4h)"
                },
                {
                  "status": "affected",
                  "version": "5.2(8d)"
                },
                {
                  "status": "affected",
                  "version": "6.0(2j)"
                },
                {
                  "status": "affected",
                  "version": "5.2(8e)"
                },
                {
                  "status": "affected",
                  "version": "6.0(3d)"
                },
                {
                  "status": "affected",
                  "version": "6.0(3e)"
                },
                {
                  "status": "affected",
                  "version": "5.2(8f)"
                },
                {
                  "status": "affected",
                  "version": "5.2(8g)"
                },
                {
                  "status": "affected",
                  "version": "5.3(1d)"
                },
                {
                  "status": "affected",
                  "version": "5.2(8h)"
                },
                {
                  "status": "affected",
                  "version": "6.0(4c)"
                },
                {
                  "status": "affected",
                  "version": "5.3(2a)"
                },
                {
                  "status": "affected",
                  "version": "5.2(8i)"
                },
                {
                  "status": "affected",
                  "version": "6.0(5h)"
                },
                {
                  "status": "affected",
                  "version": "5.3(2b)"
                },
                {
                  "status": "affected",
                  "version": "6.0(3g)"
                },
                {
                  "status": "affected",
                  "version": "6.0(5j)"
                },
                {
                  "status": "affected",
                  "version": "5.3(2c)"
                },
                {
                  "status": "affected",
                  "version": "6.0(6c)"
                },
                {
                  "status": "affected",
                  "version": "6.1(1f)"
                },
                {
                  "status": "affected",
                  "version": "6.0(7e)"
                },
                {
                  "status": "affected",
                  "version": "5.3(2d)"
                },
                {
                  "status": "affected",
                  "version": "6.0(8d)"
                },
                {
                  "status": "affected",
                  "version": "6.0(8e)"
                },
                {
                  "status": "affected",
                  "version": "6.1(2f)"
                },
                {
                  "status": "affected",
                  "version": "6.0(8f)"
                },
                {
                  "status": "affected",
                  "version": "5.3(2e)"
                },
                {
                  "status": "affected",
                  "version": "6.1(2g)"
                },
                {
                  "status": "affected",
                  "version": "5.3(2f)"
                },
                {
                  "status": "affected",
                  "version": "6.0(9c)"
                },
                {
                  "status": "affected",
                  "version": "6.1(3f)"
                },
                {
                  "status": "affected",
                  "version": "6.0(9d)"
                },
                {
                  "status": "affected",
                  "version": "6.0(6g)"
                },
                {
                  "status": "affected",
                  "version": "6.0(6h)"
                },
                {
                  "status": "affected",
                  "version": "6.0(8h)"
                },
                {
                  "status": "affected",
                  "version": "6.1(3g)"
                },
                {
                  "status": "affected",
                  "version": "6.1(4h)"
                },
                {
                  "status": "affected",
                  "version": "6.0(9e)"
                },
                {
                  "status": "affected",
                  "version": "6.1(5e)"
                },
                {
                  "status": "affected",
                  "version": "6.2(1f)"
                },
                {
                  "status": "affected",
                  "version": "6.2(1g)"
                },
                {
                  "status": "affected",
                  "version": "6.0(9f)"
                },
                {
                  "status": "affected",
                  "version": "6.2(2e)"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "As part of Cisco\u0027s 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.\r\n\r\nThe vulnerabilities tracked by CVE-2026-76499 are related to improper neutralization issues that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-707.\r\n\u0026nbsp;"
            }
          ],
          "exploits": [
            {
              "lang": "en",
              "value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.8,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "format": "cvssV3_1"
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-707",
                  "description": "Improper Neutralization",
                  "lang": "en",
                  "type": "cwe"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-07T16:17:25.662Z",
            "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
            "shortName": "cisco"
          },
          "references": [
            {
              "name": "cisco-sa-hardening-apic-UOXWtfh",
              "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-apic-UOXWtfh"
            }
          ],
          "source": {
            "advisory": "cisco-sa-hardening-apic-UOXWtfh",
            "defects": [
              "CSCwu66689"
            ],
            "discovery": "INTERNAL"
          },
          "title": "Cisco Application Policy Infrastructure Controller Hardening Release: October 2026 - Improper Neutralization Vulnerabilities"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
        "assignerShortName": "cisco",
        "cveId": "CVE-2026-76499",
        "datePublished": "2026-10-07T16:17:25.662Z",
        "dateReserved": "2026-08-19T12:02:03.641Z",
        "dateUpdated": "2026-10-07T17:48:13.369Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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