Buffer overflow in HCL Notes
Priority LOW 30CWE-120Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- High
- 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
HCL Notes is susceptible to a Buffer Overflow vulnerability in DXL due to improper validation of user input. A successful exploit could enable an attacker to crash Notes or execute attacker-controlled code on the client system.
Why it matters now
EPSS 0.00325 25th 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 |
|---|---|---|---|---|---|
| — | HCL Notes | v9; v10; v11 | — | No fix listed | CNA |
- HCL Notes Vendor— Affected v9; v10; v11 Fixed in — No fix listed CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:hcltech:notes:*:*:*:*:*:*:*:* | 9.0.0 – 9.0.1 | Vulnerable | HCL Software |
| cpe:2.3:a:hcltech:notes:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | HCL Software |
| cpe:2.3:a:hcltech:notes:10.0.1:-:*:*:*:*:*:* | 10.0.1 | Vulnerable | HCL Software |
| cpe:2.3:a:hcltech:notes:10.0.1:fp1:*:*:*:*:*:* | 10.0.1 fp1 | Vulnerable | HCL Software |
| cpe:2.3:a:hcltech:notes:10.0.1:fp2:*:*:*:*:*:* | 10.0.1 fp2 | Vulnerable | HCL Software |
| cpe:2.3:a:hcltech:notes:10.0.1:fp3:*:*:*:*:*:* | 10.0.1 fp3 | Vulnerable | HCL Software |
| cpe:2.3:a:hcltech:notes:10.0.1:fp4:*:*:*:*:*:* | 10.0.1 fp4 | Vulnerable | HCL Software |
| cpe:2.3:a:hcltech:notes:10.0.1:fp5:*:*:*:*:*:* | 10.0.1 fp5 | Vulnerable | HCL Software |
| cpe:2.3:a:hcltech:notes:11.0:*:*:*:*:*:*:* | 11.0 | Vulnerable | HCL Software |
| cpe:2.3:a:hcltech:notes:11.0.1:*:*:*:*:*:*:* | 11.0.1 | Vulnerable | HCL Software |
- cpe:2.3:a:hcltech:notes:*:*:*:*:*:*:*:* Versions 9.0.0 – 9.0.1 Vulnerable ·HCL Software
- cpe:2.3:a:hcltech:notes:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·HCL Software
- cpe:2.3:a:hcltech:notes:10.0.1:-:*:*:*:*:*:* Versions 10.0.1 Vulnerable ·HCL Software
- cpe:2.3:a:hcltech:notes:10.0.1:fp1:*:*:*:*:*:* Versions 10.0.1 fp1 Vulnerable ·HCL Software
- cpe:2.3:a:hcltech:notes:10.0.1:fp2:*:*:*:*:*:* Versions 10.0.1 fp2 Vulnerable ·HCL Software
- cpe:2.3:a:hcltech:notes:10.0.1:fp3:*:*:*:*:*:* Versions 10.0.1 fp3 Vulnerable ·HCL Software
- cpe:2.3:a:hcltech:notes:10.0.1:fp4:*:*:*:*:*:* Versions 10.0.1 fp4 Vulnerable ·HCL Software
- cpe:2.3:a:hcltech:notes:10.0.1:fp5:*:*:*:*:*:* Versions 10.0.1 fp5 Vulnerable ·HCL Software
- cpe:2.3:a:hcltech:notes:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·HCL Software
- cpe:2.3:a:hcltech:notes:11.0.1:*:*:*:*:*:*:* Versions 11.0.1 Vulnerable ·HCL Software
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-4102
- 2026-10-03 Alias added: GHSA-qrxp-3jr9-xcc9
References
More HCL Software Notes vulnerabilities
- TI-2022-22044 Out-of-bounds write in HCL Software Notes CVSS 3.1CRITICAL 9.8
- TI-2022-22042 Out-of-bounds write in HCL Software Notes CVSS 3.1CRITICAL 9.8
- TI-2022-22040 Out-of-bounds write in HCL Software Notes CVSS 3.1CRITICAL 9.8
- TI-2020-11157 Out-of-bounds write in HCL Notes CVSS 3.1CRITICAL 9.8
- TI-2020-11139 Out-of-bounds write in HCL Notes CVSS 3.1CRITICAL 9.8
- TI-2020-11143 A vulnerability in the input parameter handling of HCL Notes v9 could potentially be… CVSS 3.1HIGH 8.8
Sources
- CVE-2020-4102 · CVE Program
- CVE-2020-4102 · NVD
- FIRST EPSS
- GHSA-qrxp-3jr9-xcc9 · GitHub Advisory Database · CC BY 4.0
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