CVE-2017-20005

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.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total 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

3.28% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 87.4% of scored records. A rank, not a probability.

NVD base score

9.8 (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:H/A:H

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

2021-06-06 21:04Z5 YR AGO

Last updated

2025-12-05 14:54Z9 MO AGO

Reserved

2021-06-06

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base
• CWE-190Integer Overflow or WraparoundBase

Data version

5.2

Document digest

56683c29d4d6d715dfe42c004d0500b3ec96579190dc970b53090203ed4cc474

• nginx.orghttp://nginx.org/en/CHANGESx_refsource_MISC
• trac.nginx.orghttps://trac.nginx.org/nginx/ticket/1368x_refsource_MISC
• github.comhttps://github.com/nginx/nginx/commit/0206ebe76f748bb39d9de4dd4b3fce777fdfdccfx_refsource_MISC
• github.comhttps://github.com/nginx/nginx/commit/b900cc28fcbb4cf5a32ab62f80b59292e1c85b4bx_refsource_MISC
• lists.debian.org[debian-lts-announce] 20210607 [SECURITY] [DLA 2680-1] nginx security updatehttps://lists.debian.org/debian-lts-announce/2021/06/msg00009.htmlmailing-listx_refsource_MLIST
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20210805-0006/x_refsource_CONFIRM