HOMEVULNERABILITIESCVE-2020-26130
HIGH

CVE-2020-26130

CWE-732Published: October 28, 2020· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2020-26130 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

open_tftp_server_project1 product(s)
open tftp server
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/an0ry/advisories
ADVISORYhttps://github.com/an0ry/advisories

All References (6)

→
https://github.com/OffensiveOceloot/advisories/blob/main/CVE-2020-26130.md
→
https://github.com/an0ry/advisoriesExploit · Third Party Advisory
→
https://sourceforge.net/projects/tftp-server/Product
→
https://github.com/OffensiveOceloot/advisories/blob/main/CVE-2020-26130.md
→
https://github.com/an0ry/advisoriesExploit · Third Party Advisory
→
https://sourceforge.net/projects/tftp-server/Product

Quick Facts

CVE IDCVE-2020-26130
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-732
CISA KEVNo
Affected1 vendor(s)
PublishedOct 28, 2020

Related CVEs (CWE-732)

CVE-2014-125121
10.0
CVE-2025-12004
10.0
CVE-2026-9508
10.0
CVE-2025-14988
10.0
CVE-2025-69426
10.0
CVE-2025-49131
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-26130 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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