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Vulnerabilities/CVE-2021-22946Public Intelligence Dossier
Source: haxx · Limited verification•Last verified: •Collection Degraded
CVE-2021-22946Unknown / EvaluatingHIGH (raw)CVSS 7.5CWE-325

A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSESSL_CONTROL` or `CURLUSESSL_ALL` withlibcurl)

Published: 30 Sept 2021•Last updated: 14 Oct 2026, 05:47 PM IST•Source identifier: support@hackerone.com
Dossier completeness: source-provided sections 2 / 3 · rule guidance available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Unknown
KEV status was not determined.
CVSS score
7.5HIGH (raw)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Metric sourcenvd@nist.gov
EPSS probability
4.5%0.045
Percentile91st
Weakness type
CWE-325
CWE-319
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSESSL_CONTROL` or `CURLUSESSL_ALL` withlibcurl). This requirement could be bypassed if the server would return a properly crafted but perfectly legitimate response.This flaw would then make curl silently continue its operations **withoutTLS** contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network.

SOC priority

High

Actively exploited

Unknown

Publicly disclosed

Unknown

Risk basis: Microsoft or Microsoft-managed product relevance; HIGH severity; No confirmed exploitation signal in current enrichment

Affected Products & Remediation

29 source-backed products
Affected products and versions (source)
  • haxx curl · >= 7.20.0 < 7.79.0 · NVD CPE · Source
  • debian debian linux · 9.0; 10.0; 11.0 · NVD CPE · Source
  • fedoraproject fedora · 33; 35 · NVD CPE · Source
  • netapp cloud backup · version range not provided by source · NVD CPE · Source
  • netapp clustered data ontap · version range not provided by source · NVD CPE · Source
  • netapp oncommand insight · version range not provided by source · NVD CPE · Source
  • netapp oncommand workflow automation · version range not provided by source · NVD CPE · Source
  • netapp snapcenter · version range not provided by source · NVD CPE · Source
  • netapp h300s firmware · version range not provided by source · NVD CPE · Source
  • netapp h500s firmware · version range not provided by source · NVD CPE · Source
  • netapp h700s firmware · version range not provided by source · NVD CPE · Source
  • netapp h300e firmware · version range not provided by source · NVD CPE · Source
  • netapp h500e firmware · version range not provided by source · NVD CPE · Source
  • netapp h700e firmware · version range not provided by source · NVD CPE · Source
  • netapp h410s firmware · version range not provided by source · NVD CPE · Source
  • netapp solidfire baseboard management controller firmware · version range not provided by source · NVD CPE · Source
  • oracle communications cloud native core binding support function · 1.11.0; 22.1.3 · NVD CPE · Source
  • oracle communications cloud native core network function cloud native environment · 1.10.0 · NVD CPE · Source
  • oracle communications cloud native core network repository function · 1.15.0; 1.15.1; 22.1.0; 22.2.0 · NVD CPE · Source
  • oracle communications cloud native core network slice selection function · 1.8.0 · NVD CPE · Source
  • oracle communications cloud native core service communication proxy · 1.15.0 · NVD CPE · Source
  • oracle mysql server · >= 5.7.0 <= 5.7.35; >= 8.0.0 <= 8.0.26 · NVD CPE · Source
  • oracle peoplesoft enterprise peopletools · 8.57; 8.58; 8.59 · NVD CPE · Source
  • apple macos · < 12.3 · NVD CPE · Source
  • siemens sinec infrastructure network services · < 1.0.1.1 · NVD CPE · Source
  • oracle commerce guided search · 11.3.2 · NVD CPE · Source
  • oracle communications cloud native core console · 22.2.0 · NVD CPE · Source
  • oracle communications cloud native core security edge protection proxy · 22.1.1 · NVD CPE · Source
  • splunk universal forwarder · >= 8.2.0 < 8.2.12; >= 9.0.0 < 9.0.6; 9.1.0 · NVD CPE · Source
NVD applicability prerequisites: cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*, cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*, cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*, cpe:2.3:h:netapp:h300e:-:*:*:*:*:*:*:*, cpe:2.3:h:netapp:h500e:-:*:*:*:*:*:*:*, cpe:2.3:h:netapp:h700e:-:*:*:*:*:*:*:*, cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*, cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:*. These are conditions, not proof that an environment is exposed or unaffected.
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

Not provided by source

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Unknown
Exploited (source statement)
Unknown
Publicly disclosed (source)
Unknown

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

Matched network-unauthenticated (CVSS AV:N, CVSS PR:N, CVSS UI:N)

Exposure

  1. Identify devices reporting this CVE and note which expose the affected service to untrusted networks.Telemetry: DeviceTvmSoftwareVulnerabilities · A network-reachable, no-privilege vector makes internet-facing instances the first exposure question. · Rule network-unauthenticated

Exploitation evidence

  1. Review inbound connections to the affected service from unexpected sources since the advisory date.Telemetry: DeviceNetworkEvents · Hunting hypothesis from the CVSS vector; it does not show that exploitation occurred. · Rule network-unauthenticated

Response

  1. Confirm the source-stated update is installed and the CVE is no longer reported.Telemetry: DeviceTvmSoftwareVulnerabilities · A follow-up inventory check verifies remediation. · Rule network-unauthenticated

CISA KEV Record

CISA KEV status was not determined for this record.

Change History & Source Data

— No recorded material change

CNA / source
support@hackerone.com
Record status · verification
UPDATED · NVD API
CPE
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*, cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*, cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*, cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*, cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*, cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*, cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*, cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*, cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*, cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*

Evidence & Provenance

3 public sources
cert-portal.siemens.comSource recordnvd.nist.govSource recordhackerone.comSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2021-22946
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2021-22946
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2021-22946"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

Correlated briefings

— No published briefing references this CVE

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.