CVE-2026-28197 (GCVE-0-2026-28197)
Vulnerability from cvelistv5 – Published: 2026-09-18 11:07 – Updated: 2026-09-18 14:31
VLAI
EPSS
VEX
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
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 14:14 UTC
CWE
- CWE-88 - Improper neutralization of argument delimiters in a command ('argument injection')
Assigner
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 |
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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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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.
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.
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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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