HOME VULNERABILITIESCVE-2021-22946

HIGH

CVE-2021-22946

CWE-325Published: September 29, 2021· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official 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.

Technical Analysis

CVE-2021-22946 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

Apple1 product(s)

macos

Debian1 product(s)

debian linux

Fedora1 product(s)

fedora

haxx1 product(s)

curl

netapp21 product(s)

cloud backupclustered data ontaponcommand insightoncommand workflow automationsnapcenterh300s firmwareh300sh500s firmwareh500sh700s firmwareh700sh300e firmware+9

Oracle10 product(s)

communications cloud native core binding support functioncommunications cloud native core network function cloud native environmentcommunications cloud native core network repository functioncommunications cloud native core network slice selection functioncommunications cloud native core service communication proxymysql serverpeoplesoft enterprise peopletoolscommerce guided searchcommunications cloud native core consolecommunications cloud native core security edge protection proxy

siemens1 product(s)

sinec infrastructure network services

splunk1 product(s)

universal forwarder

Source: NVD CPE · 47 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf

PATCHhttps://hackerone.com/reports/1334111

PATCHhttps://www.oracle.com/security-alerts/cpuapr2022.html

PATCHhttps://www.oracle.com/security-alerts/cpujul2022.html

PATCHhttps://www.oracle.com/security-alerts/cpuoct2021.html

PATCHhttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf

PATCHhttps://hackerone.com/reports/1334111

PATCHhttps://www.oracle.com/security-alerts/cpuapr2022.html

PATCHhttps://www.oracle.com/security-alerts/cpujul2022.html

PATCHhttps://www.oracle.com/security-alerts/cpuoct2021.html

ADVISORYhttp://seclists.org/fulldisclosure/2022/Mar/29

ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/09/msg00022.html

ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/08/msg00017.html

ADVISORYhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/

ADVISORYhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/

ADVISORYhttps://security.gentoo.org/glsa/202212-01

ADVISORYhttps://security.netapp.com/advisory/ntap-20211029-0003/

ADVISORYhttps://security.netapp.com/advisory/ntap-20220121-0008/

ADVISORYhttps://support.apple.com/kb/HT213183

ADVISORYhttps://www.debian.org/security/2022/dsa-5197

ADVISORYhttps://www.oracle.com/security-alerts/cpujan2022.html

ADVISORYhttp://seclists.org/fulldisclosure/2022/Mar/29

ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/09/msg00022.html

ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/08/msg00017.html

ADVISORYhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/

ADVISORYhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/

ADVISORYhttps://security.gentoo.org/glsa/202212-01

ADVISORYhttps://security.netapp.com/advisory/ntap-20211029-0003/

ADVISORYhttps://security.netapp.com/advisory/ntap-20220121-0008/

ADVISORYhttps://support.apple.com/kb/HT213183

ADVISORYhttps://www.debian.org/security/2022/dsa-5197

ADVISORYhttps://www.oracle.com/security-alerts/cpujan2022.html

All References (32)

→

http://seclists.org/fulldisclosure/2022/Mar/29Mailing List · Third Party Advisory

→

https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch · Third Party Advisory

→

https://hackerone.com/reports/1334111Exploit · Issue Tracking · Patch · Third Party Advisory

→

https://lists.debian.org/debian-lts-announce/2021/09/msg00022.htmlMailing List · Third Party Advisory

→

https://lists.debian.org/debian-lts-announce/2022/08/msg00017.htmlMailing List · Third Party Advisory

→

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/Mailing List · Third Party Advisory

→

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/Mailing List · Third Party Advisory

→

https://security.gentoo.org/glsa/202212-01Third Party Advisory

→

https://security.netapp.com/advisory/ntap-20211029-0003/Third Party Advisory

→

https://security.netapp.com/advisory/ntap-20220121-0008/Third Party Advisory

→

https://support.apple.com/kb/HT213183Release Notes · Third Party Advisory

→

https://www.debian.org/security/2022/dsa-5197Third Party Advisory

→

https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch · Third Party Advisory

→

https://www.oracle.com/security-alerts/cpujan2022.htmlThird Party Advisory

→

https://www.oracle.com/security-alerts/cpujul2022.htmlPatch · Third Party Advisory

Quick Facts

CVE IDCVE-2021-22946

CVSS Score7.5 / 10

SeverityHIGH

WeaknessCWE-325

CISA KEVNo

Affected8 vendor(s)

PublishedSep 29, 2021

Related CVEs (CWE-325)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2021-22946 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

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