CVE-2021-39155

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

1.25% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 69.2% 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

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

2021-08-24 22:25Z5 YR AGO

Last updated

2024-08-04 01:58Z2 YR AGO

Reserved

2021-08-16

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 8.3)

CNA CVSS vector

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

Weaknesses

• CWE-178Improper Handling of Case SensitivityBase
• CWE-863Incorrect AuthorizationClass

Data version

5.1

Document digest

eef46d88fadfaceefd9550f70efbe49a5e1d98bef20c5c7419a699de4348d421

• github.comhttps://github.com/istio/istio/security/advisories/GHSA-7774-7vr3-cc8jx_refsource_CONFIRM
• datatracker.ietf.orghttps://datatracker.ietf.org/doc/html/rfc4343x_refsource_MISC