CVE-2026-9789
Published: 28 May 2026
Summary
CVE-2026-9789 is a high-severity Path Traversal (CWE-22) vulnerability in Acer NitroSense (inferred from references). Its CVSS base score is 8.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 4.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-32700
Vulnerability details
A Local Privilege Escalation (LPE) vulnerability affects Acer NitroSense software versions prior to 3.01.3052. The vulnerability stems from the the PSAdminAgent service, which creates a Named Pipe with a weak Access Control List (ACL). This allows any authenticated local user…
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to connect and send commands. Because the service does not check the caller's privileges before running file deletion commands, a low-privileged local user can exploit this to delete arbitrary files with system authority.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
LPE via weak named pipe ACL and missing privilege checks on file deletion commands directly matches Exploitation for Privilege Escalation.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
The access control policy and procedures directly mandate and enforce proper access control mechanisms across the organization.
Implements core proper privilege management by restricting to only required rights.
The awareness and training policy mandates training on access control practices, directly reducing the likelihood of improper access control weaknesses being introduced or exploited.
Training covers proper privilege management practices, making incorrect privilege assignments less likely.
Certification requires independent assessment confirming access controls are implemented correctly and effective.
Baseline includes documented access control settings that are reviewed and maintained, reducing the ability to exploit improper access control.
Enforces access controls and oversight on who can propose, approve, or implement configuration modifications.
Reviewing changes for security impacts prevents introduction of improper privilege assignments or escalations.