Insecure Permissions in Splashtop Software Updater
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
The C:\Program Files (x86)\Splashtop\Splashtop Software Updater\uninst.exe process creates a folder at C:\Windows\Temp~nsu.tmp and copies itself to it as Au_.exe. The C:\Windows\Temp~nsu.tmp\Au_.exe file is automatically launched as SYSTEM when the system reboots or when a standard user runs an MSI repair using Splashtop Streamer’s Windows Installer. Since the C:\Windows\Temp~nsu.tmp folder inherits permissions from C:\Windows\Temp and Au_.exe is susceptible to DLL hijacking, standard users can write a malicious DLL to it and elevate their privileges.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Splashtop | Splashtop Software Updater | before 1.5.6.21 | 1.5.6.21 | Patch available | CNA |
- Splashtop Software Updater VendorSplashtop Affected before 1.5.6.21 Fixed in 1.5.6.21 Patch available CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:splashtop:mirroring360_receiver:*:*:*:*:*:*:*:* | before 2.4.0.1 | Vulnerable | Splashtop |
| cpe:2.3:a:splashtop:mirroring360_sender:*:*:*:*:*:*:*:* | before 1.3.0.0 | Vulnerable | Splashtop |
| cpe:2.3:a:splashtop:splashtop:*:*:*:*:business:*:*:* | before 3.5.6.0 | Vulnerable | Splashtop |
| cpe:2.3:a:splashtop:splashtop:*:*:*:*:personal:*:*:* | before 3.5.8.0 | Vulnerable | Splashtop |
| cpe:2.3:a:splashtop:splashtop_for_rmm:*:*:*:*:*:*:*:* | before 3.5.8.0 | Vulnerable | Splashtop |
| cpe:2.3:a:splashtop:streamer:*:*:*:*:-:windows:*:* | before 3.5.6.0 | Vulnerable | Splashtop |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
- cpe:2.3:a:splashtop:mirroring360_receiver:*:*:*:*:*:*:*:* Versions before 2.4.0.1 Vulnerable ·Splashtop
- cpe:2.3:a:splashtop:mirroring360_sender:*:*:*:*:*:*:*:* Versions before 1.3.0.0 Vulnerable ·Splashtop
- cpe:2.3:a:splashtop:splashtop:*:*:*:*:business:*:*:* Versions before 3.5.6.0 Vulnerable ·Splashtop
- cpe:2.3:a:splashtop:splashtop:*:*:*:*:personal:*:*:* Versions before 3.5.8.0 Vulnerable ·Splashtop
- cpe:2.3:a:splashtop:splashtop_for_rmm:*:*:*:*:*:*:*:* Versions before 3.5.8.0 Vulnerable ·Splashtop
- cpe:2.3:a:splashtop:streamer:*:*:*:*:-:windows:*:* Versions before 3.5.6.0 Vulnerable ·Splashtop
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
Remediation
- Fix · CNA Splashtop Software Updater (Splashtop) Fixed in 1.5.6.21
Timeline
- 2026-10-02 Threatist record created from CVE-2023-3181
- 2026-10-03 Alias added: GHSA-vp9f-3rqh-83pc
References
Sources
- CVE-2023-3181 · CVE Program
- CVE-2023-3181 · NVD
- FIRST EPSS
- GHSA-vp9f-3rqh-83pc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences