CVE-2021-37136

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 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

5.90% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 93.0% 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:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-08.

Red Hat severity

Moderate. 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

2021-10-19 00:00Z5 YR AGO

Last updated

2026-10-08 21:13Z20 DAYS AGO

Reserved

2021-07-20

Assigning CNA

JFROG

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-400Uncontrolled Resource ConsumptionClass

Data version

5.2

Document digest

a2b0245829678d2ec7017948bac46788655a7dafb8f8763ff79061435f27c099

• github.comhttps://github.com/netty/netty/security/advisories/GHSA-grg4-wf29-r9vv
• lists.apache.org[tinkerpop-dev] 20211025 [jira] [Created] (TINKERPOP-2632) Netty 4.1.61 flagged with two high severity security violationshttps://lists.apache.org/thread.html/rfb2bf8597e53364ccab212fbcbb2a4e9f0a9e1429b1dc08023c6868e%40%3Cdev.tinkerpop.apache.org%3Emailing-list
• lists.apache.org[druid-commits] 20211025 [GitHub] [druid] jihoonson opened a new pull request #11844: Bump netty4 to 4.1.68; suppress CVE-2021-37136 and CVE-2021-37137 for netty3https://lists.apache.org/thread.html/r75490c61c2cb7b6ae2c81238fd52ae13636c60435abcd732d41531a0%40%3Ccommits.druid.apache.org%3Emailing-list
• lists.apache.org[druid-commits] 20211025 [GitHub] [druid] jihoonson commented on pull request #11844: Bump netty4 to 4.1.68; suppress CVE-2021-37136 and CVE-2021-37137 for netty3https://lists.apache.org/thread.html/r5406eaf3b07577d233b9f07cfc8f26e28369e6bab5edfcab41f28abb%40%3Ccommits.druid.apache.org%3Emailing-list
• lists.apache.org[druid-commits] 20211025 [GitHub] [druid] a2l007 commented on pull request #11844: Bump netty4 to 4.1.68; suppress CVE-2021-37136 and CVE-2021-37137 for netty3https://lists.apache.org/thread.html/r5e05eba32476c580412f9fbdfc9b8782d5b40558018ac4ac07192a04%40%3Ccommits.druid.apache.org%3Emailing-list
• lists.apache.org[druid-commits] 20211026 [GitHub] [druid] clintropolis merged pull request #11844: Bump netty4 to 4.1.68; suppress CVE-2021-37136 and CVE-2021-37137 for netty3https://lists.apache.org/thread.html/r06a145c9bd41a7344da242cef07977b24abe3349161ede948e30913d%40%3Ccommits.druid.apache.org%3Emailing-list
• lists.apache.org[druid-commits] 20211026 [GitHub] [druid] jihoonson commented on pull request #11844: Bump netty4 to 4.1.68; suppress CVE-2021-37136 and CVE-2021-37137 for netty3https://lists.apache.org/thread.html/rd262f59b1586a108e320e5c966feeafbb1b8cdc96965debc7cc10b16%40%3Ccommits.druid.apache.org%3Emailing-list
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujan2022.html
• www.oracle.comhttps://www.oracle.com/security-alerts/cpuapr2022.html
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20220210-0012/
• www.oracle.comhttps://www.oracle.com/security-alerts/cpujul2022.html
• lists.debian.org[debian-lts-announce] 20230111 [SECURITY] [DLA 3268-1] netty security updatehttps://lists.debian.org/debian-lts-announce/2023/01/msg00008.htmlmailing-list
• www.debian.orgDSA-5316https://www.debian.org/security/2023/dsa-5316vendor-advisory