{"cve":"CVE-2021-22897","nvd":{"published":"2021-06-11T16:15:10.963","modified":"2026-10-14T11:16:52.620","status":"Modified","description":"curl 7.61.0 through 7.76.1 suffers from exposure of data element to wrong session due to a mistake in the code for CURLOPT_SSL_CIPHER_LIST when libcurl is built to use the Schannel TLS library. The selected cipher set was stored in a single \"static\" variable in the library, which has the surprising side-effect that if an application sets up multiple concurrent transfers, the last one that sets the ciphers will accidentally control the set used by all transfers. In a worst-case scenario, this weakens transport security significantly.","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-668","CWE-840"],"references":["https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf","https://curl.se/docs/CVE-2021-22897.html","https://github.com/curl/curl/commit/bbb71507b7bab52002f9b1e0880bed6a32834511","https://hackerone.com/reports/1172857","https://security.netapp.com/advisory/ntap-20210727-0007/"],"products":["haxx:curl","netapp:cloud_backup","netapp:h300e_firmware","netapp:h300s_firmware","netapp:h410s_firmware","netapp:h500e_firmware","netapp:h500s_firmware","netapp:h700e_firmware","netapp:h700s_firmware","netapp:hci_compute_node_firmware","netapp:solidfire\\,_enterprise_sds_\\&_hci_storage_node","netapp:solidfire_\\&_hci_management_node","netapp:solidfire_baseboard_management_controller_firmware","oracle:communications_cloud_native_core_binding_support_function","oracle:communications_cloud_native_core_network_function_cloud_native_environment","oracle:communications_cloud_native_core_network_repository_function","oracle:communications_cloud_native_core_network_slice_selection_function","oracle:communications_cloud_native_core_service_communication_proxy","oracle:essbase","oracle:mysql_server","siemens:sinec_infrastructure_network_services","splunk:universal_forwarder"],"source":"nvd","synced_at":"2026-10-19T21:20:07.141963181+00:00"},"epss":{"cve":"CVE-2021-22897","score":0.04265,"percentile":0.91009,"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."]}