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CVE Record

CVE-2016-1261: Junos: vulnerabilities in J-Web (CVE-2016-1261)

J-Web does not validate certain input that may lead to cross-site request forgery (CSRF) issues or cause a denial of J-Web service (DoS).

HighCVSS 7.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2016-1261 affects Juniper Junos OS J-Web management interfaces. Certain input is not properly validated, which can enable cross-site request forgery or denial of the J-Web service. The business risk is highest where vulnerable Junos releases expose J-Web to administrators or management networks.

Executive priority

Treat as a high-priority network infrastructure hygiene issue, not as confirmed emergency exploitation. Prioritize internet- or broadly reachable management interfaces first, then complete upgrades across remaining affected Junos assets.

Technical view

The issue is in Junos OS J-Web input validation. The provided CVSS 3.0 score is 7.1 high, with network attack vector, high complexity, low privileges required, and user interaction required. Impact is rated high for confidentiality, integrity, and availability.

Likely exposure

Exposure is limited to Juniper Networks Junos OS versions listed as affected, especially devices where J-Web is enabled and reachable from user or management networks.

Exploitation context

The bundle does not show CISA KEV listing or any cited evidence of active exploitation. Exploitation should not be treated as confirmed from these sources. The CVSS vector indicates network reachability, low privileges, and required user interaction.

Researcher notes

The source bundle identifies the vulnerable component and affected release ranges, but provides no CWE, proof-of-concept status, or active exploitation evidence. Validation should focus on version exposure, J-Web availability, and management-plane reachability rather than exploit reproduction.

Mitigation direction

  • Upgrade affected Junos OS trains to the fixed release listed for that train or later.
  • Prioritize systems where J-Web is enabled or reachable beyond tightly controlled management networks.
  • Review Juniper advisory JSA10723 before applying changes in production.
  • Restrict J-Web access to trusted management paths while upgrade planning is underway.

Validation and detection

  • Inventory Junos OS versions across Juniper devices.
  • Check whether J-Web is enabled on each potentially affected device.
  • Compare installed releases against the affected version ranges in the vendor advisory.
  • Confirm upgraded devices run the fixed train release or later.
  • Document any exposed J-Web management paths for risk prioritization.
Prepared
Confidence
high
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2016-1261 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.1 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.1CVSS 3.0HighCVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H1.25.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

7.1High
CVSS 3.0 vector shape for CVE-2016-1261Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Juniper NetworksJunos OS12.1X44 prior to 12.1X44-D55, 12.1X46 prior to 12.1X46-D45, 12.1X47 prior to 12.1X47-D30, 12.3 prior to 12.3R11, 12.3X48 prior to 12.3X48-D30, 13.2X51 prior to 13.2X51-D40, 13.3 prior to 13.3R8, 14.1 prior to 14.1R6, 14.1X53 prior to 14.1X53-D30, 14.2 prior to 14.2R5, 15.1 prior to 15.1R3, 15.1X49 prior to 15.1X49-D20Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.