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TI-2021-00196 Aliases CVE-2021-0262GHSA-8h37-v9pc-m6v6

Junos OS: QFX10002-60C: Use after free vulnerability found during static code analysis

Priority LOW 29CWE-416Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

Through routine static code analysis of the Juniper Networks Junos OS software codebase, the Secure Development Life Cycle team identified a Use After Free vulnerability in PFE packet processing on the QFX10002-60C switching platform. Exploitation of this vulnerability may allow a logically adjacent attacker to trigger a Denial of Service (DoS). Continued exploitation of this vulnerability will sustain the Denial of Service (DoS) condition. This issue only affects QFX10002-60C devices. No other product or platform is vulnerable to this issue. This issue affects Juniper Networks Junos OS on QFX10002-60C: 19.1 version 19.1R3-S1 and later versions; 19.1 versions prior to 19.1R3-S3; 19.2 version 19.2R2 and later versions; 19.2 versions prior to 19.2R3-S1; 20.2 versions prior to 20.2R1-S2. This issue does not affect Juniper Networks Junos OS: versions prior to 19.1R3; 19.2 versions prior to 19.2R2; any version of 19.3; version 20.2R2 and later releases.

Why it matters now

EPSS 0.00404 34th percentileScored 2026-11-07
Fix Fixed Junos OS (Juniper Networks): 19.3, 20.2R2, 19.2 +1

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
JuniperJunos OS19.1R3-S1 and later; 20.2 to before 20.2R1-S219.3, 20.2R2, 19.2, 20.2R1-S2Patch availableCNA
  • Junos OS VendorJuniper Affected 19.1R3-S1 and later; 20.2 to before 20.2R1-S2 Fixed in 19.3, 20.2R2, 19.2, 20.2R1-S2 Patch available CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:o:juniper:junos:19.1:r3-s1:*:*:*:*:*:*19.1 r3-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.1:r3-s2:*:*:*:*:*:*19.1 r3-s2VulnerableJuniper
cpe:2.3:o:juniper:junos:19.2:r2:*:*:*:*:*:*19.2 r2VulnerableJuniper
cpe:2.3:o:juniper:junos:19.2:r2-s1:*:*:*:*:*:*19.2 r2-s1VulnerableJuniper
cpe:2.3:o:juniper:junos:19.2:r3:*:*:*:*:*:*19.2 r3VulnerableJuniper
cpe:2.3:o:juniper:junos:20.2:r1:*:*:*:*:*:*20.2 r1VulnerableJuniper
cpe:2.3:o:juniper:junos:20.2:r1-s1:*:*:*:*:*:*20.2 r1-s1VulnerableJuniper
  • cpe:2.3:o:juniper:junos:19.1:r3-s1:*:*:*:*:*:* Versions 19.1 r3-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.1:r3-s2:*:*:*:*:*:* Versions 19.1 r3-s2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.2:r2:*:*:*:*:*:* Versions 19.2 r2 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.2:r2-s1:*:*:*:*:*:* Versions 19.2 r2-s1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:19.2:r3:*:*:*:*:*:* Versions 19.2 r3 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.2:r1:*:*:*:*:*:* Versions 20.2 r1 Vulnerable ·Juniper
  • cpe:2.3:o:juniper:junos:20.2:r1-s1:*:*:*:*:*:* Versions 20.2 r1-s1 Vulnerable ·Juniper

Remediation

  • Fix · CNA Junos OS (Juniper Networks) Fixed in 19.3, 20.2R2, 19.2, 20.2R1-S2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-0262
  2. 2026-10-03 Alias added: GHSA-8h37-v9pc-m6v6

References

Advisory 1

  • TI-2023-18638 Junos OS: EX and SRX Series: A PHP vulnerability in J-Web allows an unauthenticated to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-01585 Out of Cycle Security Advisory: Junos OS: Security vulnerability in J-Web and web based (HTTP/HTTPS) services KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-04610 Assertion failure in ISC BIND named via TKEY queries KEVCVSS 3.1HIGH 7.5
  • TI-2025-15550 Junos OS: An local attacker with shell access can execute arbitrary code KEVCVSS 4.0MEDIUM 6.7
  • TI-2023-18644 Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload and download arbitrary files KEVCVSS 3.1MEDIUM 5.3
  • TI-2023-18640 Junos OS: EX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload arbitrary files KEVCVSS 3.1MEDIUM 5.3
See all 792 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences