CVE-2026-21620— TFTP Path Traversal
Possible ATT&CK Techniques 2AI
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I. Basic Information for CVE-2026-21620
Vulnerability Information
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Vulnerability Title
TFTP Path Traversal
Source: CVE Program / CVE List V5
Vulnerability Description
Relative Path Traversal, Improper Isolation or Compartmentalization vulnerability in erlang otp erlang/otp (tftp_file modules), erlang otp inets (tftp_file modules), erlang otp tftp (tftp_file modules) allows Relative Path Traversal. This vulnerability is associated with program files lib/tftp/src/tftp_file.erl, src/tftp_file.erl. This issue affects OTP from OTP 17.0 before OTP 28.3.2, OTP 27.3.4.8 and OTP 26.2.5.17, corresponding to tftp from 1.0 before 1.2.4, 1.2.2.1 and 1.1.1.1; also inets from 5.10 before 7.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
相对路径遍历
Source: CVE Program / CVE List V5
Vulnerability Title
Erlang/OTP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Erlang/OTP是Erlang/OTP开源的一个JavaScript编写的处理处理异常的库。该库可以捕捉node.js内置API引发的异常。 Erlang/OTP存在安全漏洞，该漏洞源于tftp_file模块存在相对路径遍历和隔离不当问题，可能导致路径遍历攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-21620
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Vendor Advisories for CVE-2026-21620 (2)
IV. Related Vulnerabilities
Same product: OTP
- CVE-2026-54890
BEAM VM crash via integer underflow in binary_to_term BIT_BI - CVE-2026-59251
Denial of service via exponential certificate policy tree gr - CVE-2026-59250
Megaco flex scanner buffer overflow via oversized property p - CVE-2026-55953
TLS 1.2 and DTLS client accepts unoffered anonymous cipher s - CVE-2026-55737
Heap pointer corruption via signed/unsigned mismatch in LARG
Same vendor: Erlang
- CVE-2026-54890
BEAM VM crash via integer underflow in binary_to_term BIT_BI - CVE-2026-59251
Denial of service via exponential certificate policy tree gr - CVE-2026-59250
Megaco flex scanner buffer overflow via oversized property p - CVE-2026-55953
TLS 1.2 and DTLS client accepts unoffered anonymous cipher s - CVE-2026-55737
Heap pointer corruption via signed/unsigned mismatch in LARG
Same weakness: CWE-23
- CVE-2026-72677
Relative Path Traversal in Kibana Fleet Leading to Unauthori - CVE-2026-16230
Formidable Digital Signatures <= 3.0.6 - Unauthenticated Arb - CVE-2026-70337
Microsoft PowerShell Remote Code Execution Vulnerability - CVE-2026-65810
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Microsoft SharePoint Server Information Disclosure Vulnerabi
V. Comments for CVE-2026-21620
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