CVE-2026-33782

Stored catalog record

Source record retrieved 2026-10-28T10:18:43.463859+00:00. Scheduled imports handle updates; this page does not assert that the provider was queried just now.

Vulnerability overview

A Missing Release of Memory after Effective Lifetime vulnerability in the DHCP daemon (jdhcpd) of Juniper Networks Junos OS on MX Series, allows an adjacent, unauthenticated attacker to cause a memory leak, that will eventually cause a complete Denial-of-Service (DoS). In a DHCPv6 over PPPoE, or DHCPv6 over VLAN with Active lease query or Bulk lease query scenario, every subscriber logout will leak a small amount of memory. When all available memory has been exhausted, jdhcpd will crash and restart which causes a complete service impact until the process has recovered. The memory usage of jdhcpd can be monitored with: user@host> show system processes extensive | match jdhcpd This issue affects Junos OS: * all versions before 22.4R3-S1, * 23.2 versions before 23.2R2, * 23.4 versions before 23.4R2.

Patch review priority

Assess exposure and vendor guidance

• No higher-priority signal is available in the current stored evidence.

FIRST EPSS: 0.29% · percentile 21.2 · score date 2026-10-27.

EPSS estimates probability of exploitation in the next 30 days. It does not measure your exposure or prove exploitation. The elevated threshold is 10%; CISA KEV takes precedence. About FIRST EPSS ↗

Severity and scoring

CVSS score

8.7 · HIGH

CVSS version

4.0

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:M/U:X

Weaknesses

CWE-401

CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.

Known exploitation and remediation

Not listed in the CISA catalog retrieved for this record. This does not establish that exploitation has not occurred.

Verify affected versions and patch availability in the vendor advisory before making changes.

Affected products and versions

• cpe:2.3:o:juniper:junos:*:*:*:*:*:*:*:*

  Before (exclusive): 22.4

• cpe:2.3:o:juniper:junos:22.4:-:*:*:*:*:*:*

• cpe:2.3:o:juniper:junos:22.4:r1:*:*:*:*:*:*

• cpe:2.3:o:juniper:junos:22.4:r1-s1:*:*:*:*:*:*

• cpe:2.3:o:juniper:junos:22.4:r1-s2:*:*:*:*:*:*

• cpe:2.3:o:juniper:junos:22.4:r2:*:*:*:*:*:*

• cpe:2.3:o:juniper:junos:22.4:r2-s1:*:*:*:*:*:*

• cpe:2.3:o:juniper:junos:22.4:r2-s2:*:*:*:*:*:*

• cpe:2.3:o:juniper:junos:22.4:r3:*:*:*:*:*:*

• cpe:2.3:o:juniper:junos:23.2:-:*:*:*:*:*:*

• cpe:2.3:o:juniper:junos:23.2:r1:*:*:*:*:*:*

• cpe:2.3:o:juniper:junos:23.2:r1-s1:*:*:*:*:*:*

• cpe:2.3:o:juniper:junos:23.2:r1-s2:*:*:*:*:*:*

• cpe:2.3:o:juniper:junos:23.4:-:*:*:*:*:*:*

• cpe:2.3:o:juniper:junos:23.4:r1:*:*:*:*:*:*

• cpe:2.3:o:juniper:junos:23.4:r1-s1:*:*:*:*:*:*

• cpe:2.3:o:juniper:junos:23.4:r1-s2:*:*:*:*:*:*

These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.

Advisories and references

• https://kb.juniper.net/JSA107820

  Vendor Advisory

Explore official sources

Read the official NVD record ↗

Explore the CISA catalog ↗

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