Issues were discovered in Open TFTP Server multithreaded 1.66 and Open TFTP Server single…
Priority LOW 34CWE-732Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
Issues were discovered in Open TFTP Server multithreaded 1.66 and Open TFTP Server single port 1.66. Due to insufficient access restrictions in the default installation directory, an attacker can elevate privileges by replacing the OpenTFTPServerMT.exe or the OpenTFTPServerSP.exe binary.
Why it matters now
EPSS 0.00444 38th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:open_tftp_server_project:open_tftp_server:1.66:*:*:*:mt:*:*:* | 1.66 | Vulnerable | Open Tftp Server Project |
| cpe:2.3:a:open_tftp_server_project:open_tftp_server:1.66:*:*:*:sp:*:*:* | 1.66 | Vulnerable | Open Tftp Server Project |
- cpe:2.3:a:open_tftp_server_project:open_tftp_server:1.66:*:*:*:mt:*:*:* Versions 1.66 Vulnerable ·Open Tftp Server Project
- cpe:2.3:a:open_tftp_server_project:open_tftp_server:1.66:*:*:*:sp:*:*:* Versions 1.66 Vulnerable ·Open Tftp Server Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-26130
- 2026-10-03 Alias added: GHSA-8qj5-3c9x-p5q4
References
More Open Tftp Server Project Open Tftp Server vulnerabilities
- TI-2018-07355 Format string vulnerability in the logMess function in TFTP Server SP 1.66 and earlier… CVSS 3.1CRITICAL 9.8
- TI-2018-07354 Heap-based overflow vulnerability in TFTP Server SP 1.66 and earlier allows remote… CVSS 3.1CRITICAL 9.8
- TI-2019-09382 Stack-based overflow vulnerability in the logMess function in Open TFTP Server SP 1.66… CVSS 3.1CRITICAL 9.8
- TI-2019-09381 Stack-based overflow vulnerability in the logMess function in Open TFTP Server MT 1.65… CVSS 3.1CRITICAL 9.8
- TI-2018-07356 Format string vulnerability in the logMess function in TFTP Server MT 1.65 and earlier… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2020-26130 · CVE Program
- CVE-2020-26130 · NVD
- FIRST EPSS
- GHSA-8qj5-3c9x-p5q4 · GitHub Advisory Database · CC BY 4.0
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