CVE-2021-3181

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

2.80% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 85.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

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

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

2021-01-19 14:30Z5 YR AGO

Last updated

2024-08-03 16:45Z2 YR AGO

Reserved

2021-01-19

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-401Missing Release of Memory after Effective LifetimeVariant

Data version

5.1

Document digest

de9136b8fff06f668c8d3165b0b32bfbdf6677f9220d6108b1e56922baf8fc0a

• gitlab.comhttps://gitlab.com/muttmua/mutt/-/issues/323x_refsource_MISC
• gitlab.comhttps://gitlab.com/muttmua/mutt/-/commit/4a2becbdb4422aaffe3ce314991b9d670b7adf17x_refsource_MISC
• gitlab.comhttps://gitlab.com/muttmua/mutt/-/commit/939b02b33ae29bc0d642570c1dcfd4b339037d19x_refsource_MISC
• gitlab.comhttps://gitlab.com/muttmua/mutt/-/commit/d4305208955c5cdd9fe96dfa61e7c1e14e176a14x_refsource_MISC
• www.openwall.com[oss-security] 20210119 Re: mutt recipient parsing memory leakhttp://www.openwall.com/lists/oss-security/2021/01/19/10mailing-listx_refsource_MLIST
• lists.debian.org[debian-lts-announce] 20210120 [SECURITY] [DLA 2529-1] mutt security updatehttps://lists.debian.org/debian-lts-announce/2021/01/msg00017.htmlmailing-listx_refsource_MLIST
• security.gentoo.orgGLSA-202101-25https://security.gentoo.org/glsa/202101-25vendor-advisoryx_refsource_GENTOO
• www.debian.orgDSA-4838https://www.debian.org/security/2021/dsa-4838vendor-advisoryx_refsource_DEBIAN
• www.openwall.com[oss-security] 20210127 glibc iconv crash with ISO-2022-JP-3http://www.openwall.com/lists/oss-security/2021/01/27/3mailing-listx_refsource_MLIST
• lists.fedoraproject.orgFEDORA-2021-a4f016c6c8https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P2OMLQKAOHPYQA4GI7ZUO6UKCPUHLYO7/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-4205e1fc23https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DXGWXFO77HBCD3VYEIYHHYU33LYWWWNQ/vendor-advisoryx_refsource_FEDORA