Vulnerability-Lookup

CVE-2026-28197 (GCVE-0-2026-28197)

Vulnerability from cvelistv5 – Published: 2026-09-18 11:07 – Updated: 2026-09-18 11:07

Title

Privilege Escalation via Argument Injection in NetBackup Flex OS Shell

Summary

An authenticated, low-privileged user with access to the NetBackup Flex OS management shell could supply a specially crafted input to a privileged administrative command, causing it to execute arbitrary code with root-level permissions. Successful exploitation grants the attacker unrestricted control over the Flex appliance host and all hosted containers, fully compromising confidentiality, integrity, and availability.

Severity

9.4 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

8.8 (High)


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

CWE

CWE-88 - Improper neutralization of argument delimiters in a command ('argument injection')

Assigner

ENISA ENISA root

References

2 references

URL	Tags
https://www.cvcn.gov.it/cvcn/cve/CVE-2026-28197	government-resource
https://github.com/cohesity/SecAdvisory/blob/mast…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
Cohesity	NetBackup Flex OS	Affected: 0 , < 6.4 (custom)	guessed

Show details on NVD website

JSON

To clipboard

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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "NetBackup Flex OS",
          "vendor": "Cohesity",
          "versions": [
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              "value": "An authenticated, low-privileged user with access to the NetBackup Flex \nOS management shell could supply a specially crafted input to a \nprivileged administrative command, causing it to execute arbitrary code \nwith root-level permissions. Successful exploitation grants the attacker\n unrestricted control over the Flex appliance host and all hosted \ncontainers, fully compromising confidentiality, integrity, and \navailability."
            }
          ],
          "value": "An authenticated, low-privileged user with access to the NetBackup Flex \nOS management shell could supply a specially crafted input to a \nprivileged administrative command, causing it to execute arbitrary code \nwith root-level permissions. Successful exploitation grants the attacker\n unrestricted control over the Flex appliance host and all hosted \ncontainers, fully compromising confidentiality, integrity, and \navailability."
        }
      ],
      "metrics": [
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            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
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          "descriptions": [
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              "cweId": "CWE-88",
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            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-18T11:07:19.877Z",
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        "shortName": "ENISA"
      },
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        },
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      },
      "title": "Privilege Escalation via Argument Injection in NetBackup Flex OS Shell",
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            }
          ],
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        }
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    "assignerShortName": "ENISA",
    "cveId": "CVE-2026-28197",
    "datePublished": "2026-09-18T11:07:19.877Z",
    "dateReserved": "2026-02-25T14:02:29.492Z",
    "dateUpdated": "2026-09-18T11:07:19.877Z",
    "state": "PUBLISHED"
  },
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                "product": "NetBackup Flex OS",
                "vendor": "Cohesity",
                "versions": [
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                    "status": "affected",
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          {
            "lang": "en",
            "value": "An authenticated, low-privileged user with access to the NetBackup Flex \nOS management shell could supply a specially crafted input to a \nprivileged administrative command, causing it to execute arbitrary code \nwith root-level permissions. Successful exploitation grants the attacker\n unrestricted control over the Flex appliance host and all hosted \ncontainers, fully compromising confidentiality, integrity, and \navailability."
          }
        ],
        "id": "CVE-2026-28197",
        "lastModified": "2026-09-18T12:17:24.573",
        "metrics": {
          "cvssMetricV31": [
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                "attackComplexity": "LOW",
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                "confidentialityImpact": "HIGH",
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                "privilegesRequired": "LOW",
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                "userInteraction": "NONE",
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              "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158",
              "type": "Secondary"
            }
          ],
          "cvssMetricV40": [
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                "Recovery": "NOT_DEFINED",
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                "attackVector": "NETWORK",
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                "confidentialityRequirement": "NOT_DEFINED",
                "exploitMaturity": "NOT_DEFINED",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "LOW",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "HIGH",
                "subConfidentialityImpact": "HIGH",
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                "valueDensity": "NOT_DEFINED",
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                "vulnIntegrityImpact": "HIGH",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
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              "type": "Secondary"
            }
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        "published": "2026-09-18T12:17:24.573",
        "references": [
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            "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158",
            "url": "https://github.com/cohesity/SecAdvisory/blob/master/COH-2026-0001.md"
          },
          {
            "source": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158",
            "url": "https://www.cvcn.gov.it/cvcn/cve/CVE-2026-28197"
          }
        ],
        "sourceIdentifier": "a6d3dc9e-0591-4a13-bce7-0f5b31ff6158",
        "vulnStatus": "Received",
        "weaknesses": [
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                "value": "CWE-88"
              }
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    }
  }
}

GHSA-3X2V-V38V-4MGX

Vulnerability from github – Published: 2026-09-18 12:31 – Updated: 2026-09-18 12:31

Details

Severity

8.8 (High)


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

9.4 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-28197"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-88"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-18T12:17:24Z",
    "severity": "CRITICAL"
  },
  "details": "An authenticated, low-privileged user with access to the NetBackup Flex \nOS management shell could supply a specially crafted input to a \nprivileged administrative command, causing it to execute arbitrary code \nwith root-level permissions. Successful exploitation grants the attacker\n unrestricted control over the Flex appliance host and all hosted \ncontainers, fully compromising confidentiality, integrity, and \navailability.",
  "id": "GHSA-3x2v-v38v-4mgx",
  "modified": "2026-09-18T12:31:20Z",
  "published": "2026-09-18T12:31:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28197"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cohesity/SecAdvisory/blob/master/COH-2026-0001.md"
    },
    {
      "type": "WEB",
      "url": "https://www.cvcn.gov.it/cvcn/cve/CVE-2026-28197"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.