# CVE-2026-112109: Local privilege escalation in SafeNet Authentication Client SACSrv

Status: published. Published: 2026-11-05. Updated: 2026-11-05.

A local privilege escalation vulnerability in Thales SafeNet Authentication Client (SAC) SACSrv can allow an authenticated, non-administrator local user to trigger a heap-based buffer overflow through the service interface. Successful exploitation may allow arbitrary code execution with Local System privileges.This issue affects SAC releases up to and including 10.9 R3 GA (build 10.9.7449).

## Remediation

- fix: Upgrade to SafeNet Authentication Client 10.9 R3 Post GA (build 10.9.7954) or later. (source: CNA: THA-PSIRT)

## Affected products and versions

- Thalesgroup / Safenet Authentication Client Service: ≥ 0; ≤ 10.9.7449 (affected, custom). Source: CNA: THA-PSIRT; platforms: Windows

## Severity and prioritization

- CVSS 4.0: 7.3 (high); CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N; source: CNA: THA-PSIRT

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-122, CWE-190

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://supportportal.thalesgroup.com/csm?id=kb_article_view&sys_kb_id=89d3c2ce2b105350cdc1f87df291bf55&sysparm_article=KB0031248 (CNA: THA-PSIRT; vendor-advisory)

## Provenance

- CNA: THA-PSIRT: https://www.cve.org/CVERecord?id=CVE-2026-112109; retrieved 2026-11-05; source updated 2026-11-05

Revision: dc6b16b0374d4fcc593e546d43d0e003db738b0f5eac9b484d9c4f29543be9aa

Canonical: https://y2.dev/cve/CVE-2026-112109

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