CVE-2018-20593

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

1.30% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 68.5% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.0/AV:L/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

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2018-12-30 18:00Z7 YR AGO

Last updated

2024-08-05 12:05Z2 YR AGO

Reserved

2018-12-30

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

b75b582aeca2b4ac9f4c7eafa089f37d14624485360d7f5823a8572bafa2410d

• github.comhttps://github.com/ntu-sec/pocs/blob/master/mxml-53c75b0/crashes/so_mxmldoc.c:2987_1.txt.errx_refsource_MISC
• github.comhttps://github.com/ntu-sec/pocs/blob/master/mxml-53c75b0/crashes/so_mxmldoc.c:2971_1.txt.errx_refsource_MISC
• github.comhttps://github.com/michaelrsweet/mxml/issues/237x_refsource_MISC
• lists.fedoraproject.orgFEDORA-2019-d333d01e08https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N53IJHDYR5HVQLKH4J6B27OEQLGKSGY5/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2019-f99619e34dhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNWF6BAU7S42O4LE4B74KIMHFE2HDNMI/vendor-advisoryx_refsource_FEDORA