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NVD / CVE Program· CNA juniper

CVE-2025-59960: Junos OS and Junos OS Evolved: DHCP Option 82 messages from clients being passed unmodified to the DHCP server

MediumCVSS 6.3 · v4.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 25/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.25% (FIRST EPSS).
  • Someone on the same network segment can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Juniper Networks Junos OS 21.2R3-S10, 21.4R3-S12, 22.2*; Juniper Networks Junos OS Evolved 21.4R3-S12-EVO, 22.2*, 22.4R3-S8-EVO.

Low priority for now. Upgrade to Juniper Networks Junos OS 21.2R3-S10, 21.4R3-S12, 22.2*; Juniper Networks Junos OS Evolved 21.4R3-S12-EVO, 22.2*, 22.4R3-S8-EVO or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

An Improper Check for Unusual or Exceptional Conditions vulnerability in the Juniper DHCP service (jdhcpd) of Juniper Networks Junos OS and Junos OS Evolved allows a DHCP client in one subnet to exhaust the address pools of other subnets, leading to a Denial of Service (DoS) on the downstream DHCP server. By default, the DHCP relay agent inserts its own Option 82 information when forwarding client requests, optionally replacing any Option 82 information provided by the client. When a specific DHCP DISCOVER is received in 'forward-only' mode with Option 82, the device should drop the message unless 'trust-option82' is configured. Instead, the DHCP relay forwards these packets to the DHCP server unmodified, which uses up addresses in the DHCP server's address pool, ultimately leading to address pool exhaustion. This issue affects Junos OS:  * all versions before 21.2R3-S10, * from 21.4 before 21.4R3-S12, * all versions of 22.2, * from 22.4 before 22.4R3-S8,  * from 23.2 before 23.2R2-S5,  * from 23.4 before 23.4R2-S6,  * from 24.2 before 24.2R2-S2,  * from 24.4 before 24.4R2,  * from 25.2 before 25.2R1-S1, 25.2R2. Junos OS Evolved: * all versions before 21.4R3-S12-EVO,  * all versions of 22.2-EVO, * from 22.4 before 22.4R3-S8-EVO,  * from 23.2 before 23.2R2-S5-EVO,  * from 23.4 before 23.4R2-S6-EVO,  * from 24.2 before 24.2R2-S2-EVO,  * from 24.4 before 24.4R2-EVO,  * from 25.2 before 25.2R1-S1-EVO, 25.2R2-EVO.

Published
Jan 15, 2026
Updated
Jun 17, 2026
EPSS
0.2% · 17th percentile

Report tools

JSON

Action score

25

Monitor

Low priority for now.

CVSS
25 / 40 · 6.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · juniper
7.4
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-59960

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
juniperjunos
juniperjunos os evolved

Versions reported by the vendor

Affected version ranges reported by the assigning authority (juniper). Independent of NVD's CPE analysis and usually ahead of it.

  • Juniper Networks Junos OS

    • before 21.2R3-S10affected · semver
    • 21.4 and later · before 21.4R3-S12affected · semver
    • 22.2 and later · before 22.2*affected · semver
    • 22.4 and later · before 22.4R3-S8affected · semver
    • 23.2 and later · before 23.2R2-S5affected · semver
    • 23.4 and later · before 23.4R2-S6affected · semver
    • 24.2 and later · before 24.2R2-S2affected · semver
    • 24.4 and later · before 24.4R2affected · semver
    • 25.2 and later · before 25.2R1-S1, 25.2R2affected · semver

  • Juniper Networks Junos OS Evolved

    • before 21.4R3-S12-EVOaffected · semver
    • 22.2 and later · before 22.2*affected · semver
    • 22.4 and later · before 22.4R3-S8-EVOaffected · semver
    • 23.2 and later · before 23.2R2-S5-EVOaffected · semver
    • 23.4 and later · before 23.4R2-S6-EVOaffected · semver
    • 24.2 and later · before 24.2R2-S2-EVOaffected · semver
    • 24.4 and later · before 24.4R2-EVOaffected · semver
    • 25.2 and later · before 25.2R1-S1-EVO, 25.2R2-EVOaffected · semver
Affected versions · NVD (19)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • juniper junosbefore 21.2
  • juniper junos21.2
  • juniper junos21.4
  • juniper junos22.2
  • juniper junos22.4
  • juniper junos23.2
  • juniper junos23.4
  • juniper junos24.2
  • juniper junos24.4
  • juniper junos25.2
  • juniper junos os evolvedbefore 21.4
  • juniper junos os evolved21.4
  • juniper junos os evolved22.2
  • juniper junos os evolved22.4
  • juniper junos os evolved23.2
  • juniper junos os evolved23.4
  • juniper junos os evolved24.2
  • juniper junos os evolved24.4
  • juniper junos os evolved25.2

Same product

juniper: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-36845Junos OS: EX and SRX Series: A PHP vulnerability in J-Web allows an unauthenticated to control an important environment variableKEV
    98Now
  • CVE-2023-36846Junos OS: SRX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload arbitrary filesKEV
    79This week
  • CVE-2023-36844Junos OS: EX Series: A PHP vulnerability in J-Web allows an unauthenticated attacker to control important environment variablesKEV
    78This week

Published before and after this one in the same product

  • ← EarlierCVE-2025-60010Oct 9, 2025 · Junos OS and Junos OS Evolved: Device allows login for user with expired password
    21Monitor
  • ← EarlierCVE-2025-59959Jan 15, 2026 · Junos OS and Junos OS Evolved: Executing a specific show command leads to an rpd crash
    27Monitor
  • Later →CVE-2025-59961Jan 15, 2026 · Junos OS and Junos OS Evolved: Unix socket used to control the jdhcpd process is world-writable
    27Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Juniper Networks Junos OS21.2R3-S10Vendor (CNA)
Juniper Networks Junos OS21.4R3-S12Vendor (CNA)
Juniper Networks Junos OS22.2*Vendor (CNA)
Juniper Networks Junos OS22.4R3-S8Vendor (CNA)
Juniper Networks Junos OS23.2R2-S5Vendor (CNA)
Juniper Networks Junos OS23.4R2-S6Vendor (CNA)
Juniper Networks Junos OS24.2R2-S2Vendor (CNA)
Juniper Networks Junos OS24.4R2Vendor (CNA)
Juniper Networks Junos OS25.2R1-S1, 25.2R2Vendor (CNA)
Juniper Networks Junos OS Evolved21.4R3-S12-EVOVendor (CNA)
Juniper Networks Junos OS Evolved22.2*Vendor (CNA)
Juniper Networks Junos OS Evolved22.4R3-S8-EVOVendor (CNA)
Juniper Networks Junos OS Evolved23.2R2-S5-EVOVendor (CNA)
Juniper Networks Junos OS Evolved23.4R2-S6-EVOVendor (CNA)
Juniper Networks Junos OS Evolved24.2R2-S2-EVOVendor (CNA)
Juniper Networks Junos OS Evolved24.4R2-EVOVendor (CNA)
Juniper Networks Junos OS Evolved25.2R1-S1-EVO, 25.2R2-EVOVendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-3379084 days apartJunos OS: SRX Series: In a NAT64 configuration, receipt of a specific, malformed ICMPv6 packet will cause the srxpfe process to crash and restart.
    34Monitor
  • CVE-2025-6000498 days apartJunos OS and Junos OS Evolved: Specific BGP EVPN update message causes rpd crash
    34Monitor
  • CVE-2025-52981188 days apartJunos OS: SRX Series: Sequence of specific PIM packets causes a flowd crash
    34Monitor
  • CVE-2025-21594281 days apartJunos OS: MX Series: In DS-lite and NAT scenario receipt of crafted IPv6 traffic causes port block
    34Monitor
  • CVE-2025-30660281 days apartJunos OS: MX Series: Decapsulation of specific GRE packets leads to PFE reset
    34Monitor
  • CVE-2024-47499461 days apartJunos OS and Junos OS Evolved: In a BMP scenario receipt of a malformed AS PATH attribute can cause an RPD crash
    34Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Adjacent
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-754 · Improper Check for Unusual or Exceptional Conditions

CVSS vector

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:H/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:U/V:C/RE:M/U:Amber

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records