{"cve":"CVE-2021-22925","nvd":{"published":"2021-08-05T21:15:11.467","modified":"2026-10-14T11:16:54.113","status":"Modified","description":"curl supports the `-t` command line option, known as `CURLOPT_TELNETOPTIONS`in libcurl. This rarely used option is used to send variable=content pairs toTELNET servers.Due to flaw in the option parser for sending `NEW_ENV` variables, libcurlcould be made to pass on uninitialized data from a stack based buffer to theserver. Therefore potentially revealing sensitive internal information to theserver using a clear-text network protocol.This could happen because curl did not call and use sscanf() correctly whenparsing the string provided by the application.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-908","CWE-200"],"references":["http://seclists.org/fulldisclosure/2021/Sep/39","http://seclists.org/fulldisclosure/2021/Sep/40","https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf","https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf","https://hackerone.com/reports/1223882"],"products":["apple:mac_os_x","apple:macos","fedoraproject:fedora","haxx:curl","netapp:cloud_backup","netapp:clustered_data_ontap","netapp:h300e_firmware","netapp:h300s_firmware","netapp:h410s_firmware","netapp:h500e_firmware","netapp:h500s_firmware","netapp:h700e_firmware","netapp:h700s_firmware","netapp:hci_management_node","netapp:solidfire","oracle:mysql_server","oracle:peoplesoft_enterprise_peopletools","siemens:sinec_infrastructure_network_services","siemens:sinema_remote_connect_server","splunk:universal_forwarder"],"source":"nvd","synced_at":"2026-10-19T21:21:13.713336758+00:00"},"epss":{"cve":"CVE-2021-22925","score":0.05367,"percentile":0.92595,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}