CVE-2021-1311

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 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

1.27% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 69.7% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2021-01-13 21:46Z5 YR AGO

Last updated

2024-11-12 20:39Z1 YR AGO

Reserved

2020-11-13

Assigning CNA

cisco

Record state

PUBLISHED

Severity

Medium (CVSS 5.4)

CNA CVSS vector

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

Weaknesses

• CWE-307Improper Restriction of Excessive Authentication AttemptsBase

Data version

5.1

Document digest

3eb08aaaefcccf0c1f07cbdf7f6420c805180e34cbfb08a20c549533719db76e

• tools.cisco.com20210113 Cisco Webex Meetings and Cisco Webex Meetings Server Host Key Brute Forcing Vulnerabilityhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-brutef-hostkey-FWRMxVFvendor-advisoryx_refsource_CISCO