CVE-2021-1391

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

0.31% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 24.5% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/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

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

2021-03-24 20:07Z5 YR AGO

Last updated

2024-11-08 23:32Z1 YR AGO

Reserved

2020-11-13

Assigning CNA

cisco

Record state

PUBLISHED

Severity

Medium (CVSS 5.1)

CNA CVSS vector

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

Weaknesses

• CWE-489Active Debug CodeBase

Data version

5.1

Document digest

3d447d10b33a070de9a89aaa4c82fb0af53768c4c1e8e89d08542e7804753d0e

• tools.cisco.com20210324 Cisco IOS and IOS XE Software Privilege Escalation Vulnerabilityhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-XE-FSM-Yj8qJbJcvendor-advisoryx_refsource_CISCO