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Vulnerability details: VCID-y4ws-1ba4-qkhj
Vulnerability ID VCID-y4ws-1ba4-qkhj
Aliases CVE-2021-22898
Summary curl 7.7 through 7.76.1 suffers from an information disclosure when the `-t` command line option, known as `CURLOPT_TELNETOPTIONS` in libcurl, is used to send variable=content pairs to TELNET servers. Due to a flaw in the option parser for sending NEW_ENV variables, libcurl could be made to pass on uninitialized data from a stack based buffer to the server, resulting in potentially revealing sensitive internal information to the server using a clear-text network protocol.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-457 Use of Uninitialized Variable
CWE-908 Use of Uninitialized Resource
CWE-909 Missing Initialization of Resource
System Score Found at
cvssv3 3.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-22898.json
epss 0.00113 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
epss 0.00113 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
epss 0.00113 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
epss 0.00113 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
epss 0.00113 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
epss 0.00113 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
epss 0.00113 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
epss 0.00113 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
epss 0.00113 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
epss 0.00113 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
epss 0.00113 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
epss 0.00113 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
epss 0.00113 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
epss 0.00113 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
epss 0.00155 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
epss 0.00155 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
epss 0.00155 https://api.first.org/data/v1/epss?cve=CVE-2021-22898
cvssv3.1 Medium https://curl.se/docs/CVE-2021-22898.html
cvssv3.1 5.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 2.6 https://nvd.nist.gov/vuln/detail/CVE-2021-22898
cvssv3.1 3.1 https://nvd.nist.gov/vuln/detail/CVE-2021-22898
archlinux High https://security.archlinux.org/AVG-1995
archlinux High https://security.archlinux.org/AVG-1996
archlinux High https://security.archlinux.org/AVG-1997
archlinux High https://security.archlinux.org/AVG-1998
archlinux Medium https://security.archlinux.org/AVG-1999
archlinux Medium https://security.archlinux.org/AVG-2000
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-22898.json
https://api.first.org/data/v1/epss?cve=CVE-2021-22898
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
https://curl.se/docs/CVE-2021-22898.html
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22898
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22924
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22945
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22946
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22947
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22576
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-27774
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-27775
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-27776
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-27781
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-27782
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-32205
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-32206
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-32207
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-32208
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde
https://hackerone.com/reports/1176461
https://lists.apache.org/thread.html/rc713534b10f9daeee2e0990239fa407e2118e4aa9e88a7041177497c%40%3Cissues.guacamole.apache.org%3E
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/POOC3UV7V6L4CJ5KA2PTWTNUV5Y72T3Q/
https://www.oracle.com/security-alerts/cpuapr2022.html
https://www.oracle.com/security-alerts/cpujan2022.html
https://www.oracle.com//security-alerts/cpujul2021.html
http://www.openwall.com/lists/oss-security/2021/07/21/4
1964887 https://bugzilla.redhat.com/show_bug.cgi?id=1964887
989228 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=989228
ASA-202106-4 https://security.archlinux.org/ASA-202106-4
ASA-202106-5 https://security.archlinux.org/ASA-202106-5
ASA-202106-6 https://security.archlinux.org/ASA-202106-6
ASA-202106-7 https://security.archlinux.org/ASA-202106-7
ASA-202106-8 https://security.archlinux.org/ASA-202106-8
ASA-202106-9 https://security.archlinux.org/ASA-202106-9
AVG-1995 https://security.archlinux.org/AVG-1995
AVG-1996 https://security.archlinux.org/AVG-1996
AVG-1997 https://security.archlinux.org/AVG-1997
AVG-1998 https://security.archlinux.org/AVG-1998
AVG-1999 https://security.archlinux.org/AVG-1999
AVG-2000 https://security.archlinux.org/AVG-2000
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:1.11.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:1.15.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:communications_cloud_native_core_network_slice_selection_function:1.8.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_cloud_native_core_service_communication_proxy:1.15.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:communications_cloud_native_core_service_communication_proxy:1.15.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:essbase:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:essbase:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:mysql_server:*:*:*:*:*:*:*:*
cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*
cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:splunk:universal_forwarder:*:*:*:*:*:*:*:*
cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:splunk:universal_forwarder:9.1.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
CVE-2021-22898 https://nvd.nist.gov/vuln/detail/CVE-2021-22898
RHSA-2021:4511 https://access.redhat.com/errata/RHSA-2021:4511
USN-5021-1 https://usn.ubuntu.com/5021-1/
USN-5021-2 https://usn.ubuntu.com/5021-2/
USN-5894-1 https://usn.ubuntu.com/5894-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-22898.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:H/Au:N/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-22898
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-22898
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.30767
EPSS Score 0.00113
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:34:32.912234+00:00 Ubuntu USN Importer Import https://usn.ubuntu.com/5894-1/ 37.0.0