CVE-2020-10188

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

74.33% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 99.4% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/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

2020-03-06 14:07Z6 YR AGO

Last updated

2026-01-21 01:32Z9 MO AGO

Reserved

2020-03-06

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base
• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass

Data version

5.2

Document digest

33d9da95a399ec2f0c08508d168cf9f4f80c2e1e3898c0495ef1017e0668a55d

• lists.fedoraproject.orgFEDORA-2020-11ea78ff8ehttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HLU6FL24BSQQEB2SJC26NLJ2MANQDA7M/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2020-e7b942a47ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7FMTRRQTYKWZD2GMXX3GLZV46OLPCLVK/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2020-6b07ff2526https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3VJ6V2Z3JRNJOBVHSOPMAC76PSSKG6A/vendor-advisoryx_refsource_FEDORA
• lists.debian.org[debian-lts-announce] 20200514 [SECURITY] [DLA 2176-1] inetutils security updatehttps://lists.debian.org/debian-lts-announce/2020/05/msg00012.htmlmailing-listx_refsource_MLIST
• tools.cisco.com20200624 Telnet Vulnerability Affecting Cisco Products: June 2020https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-telnetd-EFJrEzPxvendor-advisoryx_refsource_CISCO
• lists.debian.org[debian-lts-announce] 20200824 [SECURITY] [DLA 2341-1] inetutils security updatehttps://lists.debian.org/debian-lts-announce/2020/08/msg00038.htmlmailing-listx_refsource_MLIST
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuApr2021.htmlx_refsource_MISC
• appgateresearch.blogspot.comhttps://appgateresearch.blogspot.com/2020/02/bravestarr-fedora-31-netkit-telnetd_28.htmlx_refsource_MISC
• github.comhttps://github.com/krb5/krb5-appl/blob/d00cd671dfe945791b33d4f1f6a5c57ae1667ef8/telnet/telnetd/utility.c#L205-L216x_refsource_MISC
• www.arista.comhttps://www.arista.com/en/support/advisories-notices/security-advisories/10702-security-advisory-48x_refsource_MISC
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/01/20/8