CVE-2021-27803

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total 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

1.23% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 66.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. 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

2021-02-26 22:11Z5 YR AGO

Last updated

2025-12-18 14:57Z8 MO AGO

Reserved

2021-02-26

Assigning CNA

mitre

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

• CWE-416Use After FreeVariant

Data version

5.2

Document digest

fcc0caca0190fa0702bd2d0e8d39720082ec7199096b806b32aa498dbc6c1a3a

• www.openwall.comhttps://www.openwall.com/lists/oss-security/2021/02/25/3x_refsource_MISC
• w1.fihttps://w1.fi/security/2021-1/wpa_supplicant-p2p-provision-discovery-processing-vulnerability.txtx_refsource_MISC
• w1.fihttps://w1.fi/security/2021-1/0001-P2P-Fix-a-corner-case-in-peer-addition-based-on-PD-R.patchx_refsource_MISC
• www.openwall.com[oss-security] 20210227 Re: wpa_supplicant P2P provision discovery processing vulnerabilityhttp://www.openwall.com/lists/oss-security/2021/02/27/1mailing-listx_refsource_MLIST
• lists.fedoraproject.orgFEDORA-2021-3430f96019https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KOGP2VIVVXXQ6CZ2HU4DKGPDB4WR24XF/vendor-advisoryx_refsource_FEDORA
• lists.debian.org[debian-lts-announce] 20210302 [SECURITY] [DLA 2581-1] wpa security updatehttps://lists.debian.org/debian-lts-announce/2021/03/msg00003.htmlmailing-listx_refsource_MLIST
• lists.fedoraproject.orgFEDORA-2021-99cad2b81fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IZGUR5XFHATVXTRAEJMODS7ROYHA56NX/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-9b00febe54https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SEHS2CFGH3KCSNPHBHNGN5SGV6QPMLZ4/vendor-advisoryx_refsource_FEDORA
• www.debian.orgDSA-4898https://www.debian.org/security/2021/dsa-4898vendor-advisoryx_refsource_DEBIAN