CVE-2021-22946 - CVE House
Back to Database
Status published Unknown CVE-2021-22946

A user can tell curl >= 7.20.0 and <= 7.78.0...

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2021-22946

Credits & Attribution

No credits recorded in the NVD database.

References

More from n/a

View All →
CVE-2025-9910
Versions of the package jsondiffpatch before 0.7.2 are vulnerable to...
Low 2.3
CVE-2025-9802
RemoteClinic profile.php sql injection
Medium 5.1
CVE-2025-9799
Langfuse Webhook promptRouter.ts promptChangeEventSourcing server-side request forgery
Low 2.3
CVE-2025-9775
RemoteClinic edit-my-profile.php unrestricted upload
Medium 6.9
CVE-2025-9774
RemoteClinic edit-patient.php information disclosure
Medium 5.3

Affected Vendor

Affected Software

https://github.com/curl/curl
Vulnerable Versions:
curl 7.20.0 to and including 7.78.0

Timeline

Official Publish: September 29th, 2021
Last Modified: April 16th, 2026
Added to House: July 21st, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

CWE-325

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.