CVE-2021-3959

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

1.74% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 77.6% of scored records. A rank, not a probability.

NVD base score

7.5 (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:N/A:N

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

2021-12-16 14:35Z4 YR AGO

Last updated

2024-09-17 01:31Z2 YR AGO

Reserved

2021-11-15

Assigning CNA

Bitdefender

Record state

PUBLISHED

Severity

Medium (CVSS 6.8)

CNA CVSS vector

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

Weaknesses

• CWE-918Server-Side Request Forgery (SSRF)Base

Data version

5.1

Document digest

962a614a48bd7bbddf1f5e1487319cf7a92f2962a5d3c2f83558bf0bcc6f6c18

• www.bitdefender.comhttps://www.bitdefender.com/support/security-advisories/server-side-request-forgery-in-bitdefender-gravityzone-update-server-in-relay-mode-va-10145x_refsource_MISC