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Juniper networks junos os, out-of-bounds read: 8 records, one defect family

Juniper networks junos os has been reported 8 separate times for the same kind of mistake, CWE-125, between 2021-04-22 and 2025-01-09. A defect family is our own grouping of the CVE corpus: every record naming one product and one weakness class, collected so a repeat is visible as a repeat. No public source publishes this, and what this page counts is how often this one product has gone wrong in this one way.

What this page is, and what it is not

The records are public. This grouping is not. No source publishes defect families, so we built them: every record in the corpus sorted by the product an authority named and the weakness class carried with it, 21316 families over 105586 records. This one holds every record that names Juniper networks junos os and carries CWE-125, matched character for character. We show the join because a grouping you cannot check is a grouping you should not cite.

One record is an incident. 8 filings, between 2021-04-22 and 2025-01-09, all landing on the same weakness class in the same product, is a habit in what gets reported here, and a habit is something you can plan around. This is what we held on 2026-09-20.

A repeat is evidence about where to look. If you are reviewing Juniper networks junos os, the records below say which mistake has already been found more than once, which is the cheapest place a reviewer can start. If you are asking the vendor a question, a count under one weakness class is a better question than any single record is.

What this page cannot tell you is decided by what was joined. A product name and a weakness class settled membership, so those two values are the whole of what the page asserts. Records here may sit in the same line of code or in unrelated parts of the product, and we hold no value that separates those cases. A fixed version named in one record closes that record and says nothing about the others. And nothing here describes anyone's systems, because no value in this family connects a product name to an installation.

20212022202320242025CVE-2021-0261, published 2021-04-22CVE-2021-0277, published 2021-07-15CVE-2021-31354, published 2021-10-19CVE-2023-36838, published 2023-07-14CVE-2024-30401, published 2024-04-12CVE-2024-39516, published 2024-10-09CVE-2025-21598, published 2025-01-09CVE-2025-21600, published 2025-01-09
The 8 are spread across 3.7 years with no single year holding half of them, and the longest quiet stretch between two of them is 21 months. That is a rate rather than an episode.

The names the authorities used

One spelling, used by every authority that filed one of these records: juniper networks junos os.

These records name more than one weakness class each. All 8 carry CWE-125, which is what this family was grouped on, and one of them also names CWE-770, allocation of resources without limits or throttling. The roster below shows what each record names; both readings are the record's own, filed together by the same authority.

Family membership: held values. Joined on the product and weakness class the assigning authorities wrote, with no model involved.

What the records offer

All 8 records publish a fixed version.

The earliest was published 2021-04-22 and the latest 2025-01-09. That span is how long this product kept producing this weakness, not how long any one record took to fix.

What this page does not cover

This is a family of records that read alike. It is not a shared vulnerability, not an inventory, and not a statement that one fix closes the rest. Each record's own state, its own dates and its own receipts are on its own page.

Grouped by shared product and weakness, not by shared vulnerability. Each record's own state is on its own page.

Everything this vendor has, including records outside this family:

CVE-2021-0261Junos OS: Denial of Service vulnerability in J-Web and web based (HTTP/HTTPS) services caused by a high number of…CWE-125 Out-of-bounds Read
CVE-2021-0277Junos OS and Junos OS Evolved: LLDP Out-of-Bounds Read vulnerability in l2cpdCWE-125 Out-of-bounds Read
CVE-2021-31354Junos OS and Junos OS Evolved: A vulnerability in the Juniper Agile License Client may allow an attacker to perform…CWE-125 Out-of-bounds Read
CVE-2023-36838Junos OS: SRX Series: A flowd core occurs when running a low privileged CLI commandCWE-125 Out-of-bounds Read
CVE-2024-30401Junos OS: MX Series and EX9200-15C: Stack-based buffer overflow in aftmanCWE-125 Out-of-bounds Read
CVE-2024-39516Junos OS and Junos OS Evolved: With certain BGP options enabled, receipt of specifically malformed BGP update causes…CWE-125 Out-of-bounds Read
CVE-2025-21598Junos OS and Junos OS Evolved: When BGP traceoptions are configured, receipt of malformed BGP packets causes RPD to…CWE-125 Out-of-bounds Read
CVE-2025-21600Junos OS and Junos OS Evolved: With certain BGP options enabled, receipt of specifically malformed BGP update causes…CWE-125 Out-of-bounds Read

8 records, read from the index as it stood on 20 Sep 2026. Every row opens the record it names, and every value on that record opens its own receipt.

Everything on this page is free. Public data. Withholding it protects nothing.