CVE-2021-1256

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

0.50% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 42.6% of scored records. A rank, not a probability.

NVD base score

6.0 (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:N/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-08-11.

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

2021-04-29 17:30Z5 YR AGO

Last updated

2024-11-08 23:25Z1 YR AGO

Reserved

2020-11-13

Assigning CNA

cisco

Record state

PUBLISHED

Severity

Medium (CVSS 6.0)

CNA CVSS vector

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

Weaknesses

• CWE-552Files or Directories Accessible to External PartiesBase
• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')Base

Data version

5.1

Document digest

65d434834327ce93efee05ca66dbeb0e7a69ca365c5a943f9a63785b83c9aa57

• tools.cisco.com20210428 Cisco Firepower Threat Defense Software Command File Overwrite Vulnerabilityhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-file-overwrite-XknRjGdBvendor-advisoryx_refsource_CISCO
• kc.mcafee.comhttps://kc.mcafee.com/corporate/index?page=content&id=SB10382x_refsource_CONFIRM