ZOOK solution(remote administration tool) buffer overflow vulnerability
Priority MEDIUM 40CWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
A buffer overflow issue was discovered in ZOOK solution(remote administration tool) through processing 'ConnectMe' command while parsing a crafted OUTERIP value because of missing boundary check. This vulnerability allows the attacker to execute remote arbitrary command.
Why it matters now
EPSS 0.00818 57th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| mastersoft | ZOOKViewer_Setup.exe | 2.0.4.6 – 2.0.4.6 | — | No fix listed | CNA |
| mastersoft | ZOOKAgentSetup.exe | 2.0.6.1 – 2.0.6.1 | — | No fix listed | CNA |
- ZOOKViewer_Setup.exe Vendormastersoft Affected 2.0.4.6 – 2.0.4.6 Fixed in — No fix listed CNA
- ZOOKAgentSetup.exe Vendormastersoft Affected 2.0.6.1 – 2.0.6.1 Fixed in — No fix listed CNA
CPE configurations NVD · 3
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mastersoft:zook_agent:2.0.6.1:*:*:*:*:*:*:* | 2.0.6.1 | Vulnerable | mastersoft |
| cpe:2.3:a:mastersoft:zook_viewer:2.0.4.6:*:*:*:*:*:*:* | 2.0.4.6 | Vulnerable | mastersoft |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
- cpe:2.3:a:mastersoft:zook_agent:2.0.6.1:*:*:*:*:*:*:* Versions 2.0.6.1 Vulnerable ·mastersoft
- cpe:2.3:a:mastersoft:zook_viewer:2.0.4.6:*:*:*:*:*:*:* Versions 2.0.4.6 Vulnerable ·mastersoft
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-7877
- 2026-10-03 Alias added: GHSA-4p59-rrxq-mw63
References
Sources
- CVE-2020-7877 · CVE Program
- CVE-2020-7877 · NVD
- FIRST EPSS
- GHSA-4p59-rrxq-mw63 · GitHub Advisory Database · CC BY 4.0
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