CVE-2026-21620

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Source
https://cve.org/CVERecord?id=CVE-2026-21620
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21620.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-21620
Aliases
Downstream
Related
Published
2026-02-20T10:57:08.620Z
Modified
2026-08-12T03:51:28.613494661Z
Severity
  • 2.3 (Low) CVSS_V4 - 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 CVSS Calculator
Summary
TFTP Path Traversal
Details

Relative Path Traversal, Improper Isolation or Compartmentalization vulnerability in erlang otp erlang/otp (tftpfile modules), erlang otp inets (tftpfile modules), erlang otp tftp (tftpfile modules) allows Relative Path Traversal. This vulnerability is associated with program files lib/tftp/src/tftpfile.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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21620.json",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "17.0"
                },
                {
                    "fixed": "*"
                },
                {
                    "introduced": "07b8f441ca711f9812fad9e9115bab3c3aa92f79"
                },
                {
                    "fixed": "*"
                },
                {
                    "introduced": "5.10"
                },
                {
                    "fixed": "7.0"
                },
                {
                    "introduced": "1.0"
                },
                {
                    "fixed": "*"
                }
            ]
        }
    ],
    "cna_assigner": "EEF",
    "cwe_ids": [
        "CWE-23"
    ]
}
References

Affected packages

Git / github.com/erlang/otp

Affected ranges

Type
GIT
Repo
https://github.com/erlang/otp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Introduced
601a012837ea0a5c8095bf24223132824177124d
Introduced
9e6f6742c4d9e9915ee8af0dcb7d97cf1f836116
Fixed
3532818e19647ae5675396eb501400783e5ca693
Fixed
61633c62611720cc27f92026d075a1f2862ce522
Fixed
b74eae92e1dee97d57a9ab3ea3c36e8b701a9ca6
Fixed
3970738f687325138eb75f798054fa8960ac354e
Fixed
655fb95725ba2fb811740b57e106873833824344
Fixed
696fdec922661d4a3cc528fc34bc24fae8d4ad8a
Database specific
Show details 
{
    "source": [
        "CPE_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "26.2.5.17"
        },
        {
            "introduced": "27.0"
        },
        {
            "fixed": "27.3.4.8"
        },
        {
            "introduced": "28.0"
        },
        {
            "fixed": "28.3.2"
        }
    ]
}

Affected versions

OTP-17.*
OTP-17.0
OTP-18.*
OTP-18.0
OTP-18.0-rc1
OTP-19.*
OTP-19.0
OTP-19.0-rc1
OTP-19.0-rc2
OTP-20.*
OTP-20.0
OTP-20.0-rc1
OTP-20.0-rc2
OTP-21.*
OTP-21.0
OTP-21.0-rc1
OTP-21.0-rc2
OTP-22.*
OTP-22.0
OTP-22.0-rc1
OTP-22.0-rc2
OTP-22.0-rc3
OTP-23.*
OTP-23.0
OTP-23.0-rc1
OTP-23.0-rc2
OTP-23.0-rc3
OTP-24.*
OTP-24.0
OTP-24.0-rc1
OTP-24.0-rc2
OTP-24.0-rc3
OTP-25.*
OTP-25.0
OTP-25.0-rc1
OTP-25.0-rc2
OTP-25.0-rc3
OTP-26.*
OTP-26.0
OTP-26.0-rc1
OTP-26.0-rc2
OTP-26.0-rc3
OTP-26.1
OTP-26.2
OTP-26.2.3
OTP-26.2.4
OTP-26.2.5
OTP-26.2.5.1
OTP-26.2.5.10
OTP-26.2.5.11
OTP-26.2.5.12
OTP-26.2.5.13
OTP-26.2.5.14
OTP-26.2.5.15
OTP-26.2.5.16
OTP-26.2.5.2
OTP-26.2.5.3
OTP-26.2.5.4
OTP-26.2.5.5
OTP-26.2.5.6
OTP-26.2.5.7
OTP-26.2.5.8
OTP-26.2.5.9
OTP-27.*
OTP-27.0
OTP-27.1
OTP-27.2
OTP-27.3
OTP-27.3.1
OTP-27.3.2
OTP-27.3.3
OTP-27.3.4
OTP-27.3.4.1
OTP-27.3.4.2
OTP-27.3.4.3
OTP-27.3.4.4
OTP-27.3.4.5
OTP-27.3.4.6
OTP-27.3.4.7
OTP-28.*
OTP-28.0
OTP-28.1
OTP-28.3
OTP-28.3.1
OTP_17.*
OTP_17.0-rc1
OTP_17.0-rc2
Other
OTP_R13B03
OTP_R13B04
OTP_R14A
OTP_R14B
OTP_R14B01
OTP_R14B02
OTP_R14B03
OTP_R15A
OTP_R15B
OTP_R16A_RELEASE_CANDIDATE
OTP_R16B
patch-base-26
patch-base-27

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21620.json"