CVE-2021-22947

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

3.00% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 87.2% of scored records. A rank, not a probability.

NVD base score

5.9 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-10-14.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-09-29 00:00Z5 YR AGO

Last updated

2026-10-14 11:34Z15 DAYS AGO

Reserved

2021-01-06

Assigning CNA

hackerone

Record state

PUBLISHED

Severity

Medium (CVSS 5.9)

CNA CVSS vector

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

Weaknesses

• CWE-310
• CWE-345Insufficient Verification of Data AuthenticityClass

Data version

5.2

Document digest

fb324dbf9e2c2b5a027697dc1ffb4332c8691caa7988e3516429652371c29414

• hackerone.comhttps://hackerone.com/reports/1334763
• lists.debian.org[debian-lts-announce] 20210930 [SECURITY] [DLA 2773-1] curl security updatehttps://lists.debian.org/debian-lts-announce/2021/09/msg00022.htmlmailing-list
• lists.fedoraproject.orgFEDORA-2021-fc96a3a749https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/vendor-advisory
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuoct2021.html
• lists.fedoraproject.orgFEDORA-2021-1d24845e93https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/vendor-advisory
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujan2022.html
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20211029-0003/
• seclists.org20220314 APPLE-SA-2022-03-14-4 macOS Monterey 12.3http://seclists.org/fulldisclosure/2022/Mar/29mailing-list
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuapr2022.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
• support.apple.comhttps://support.apple.com/kb/HT213183
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujul2022.html
• www.debian.orgDSA-5197https://www.debian.org/security/2022/dsa-5197vendor-advisory
• lists.debian.org[debian-lts-announce] 20220828 [SECURITY] [DLA 3085-1] curl security updatehttps://lists.debian.org/debian-lts-announce/2022/08/msg00017.htmlmailing-list
• security.gentoo.orgGLSA-202212-01https://security.gentoo.org/glsa/202212-01vendor-advisory
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-389290.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html