VulnRadar

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Page generated: 11 Nov 2026, 14:06 UTC

CVE-2023-36851

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A Missing Authentication for Critical Function vulnerability in Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity. With a specific request to webauth_operation.php that doesn't require authentication, an attacker is able to upload and download arbitrary files via J-Web, leading to a loss of integrity or confidentiality, which may allow chaining to other vulnerabilities. This issue affects Juniper Networks Junos OS on SRX Series: * 21.2 versions prior to 21.2R3-S8; * 21.4 versions prior to 21.4R3-S6; * 22.1 versions prior to 22.1R3-S5; * 22.2 versions prior to 22.2R3-S3; * 22.3 versions prior to 22.3R3-S2; * 22.4 versions prior to 22,4R2-S2, 22.4R3; * 23.2 versions prior to 23.2R1-S2, 23.2R2.

CVSS 5.3 (MEDIUM) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE

0.0/10

REALITY · THREAT PRIORITY

7.8/10

General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?

Recorded exploitation baseline: +7.00
Technical severity: CVSS 5.3: +0.79
Fresh EPSS: 1.12%: +0.01

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 6 documents and public datasets.

Hype components

Headline sample (25%)

0/100

Press, 30 days (60%)

0/100

Grounded branding (15%)

0/100

HYPE TOTAL0/100

Sources and documents

SecurityWeek

Press · 30 Jan 2024, 08:00 · Juniper Networks Patches Vulnerabilities in Switches, Firewalls - SecurityWeek

The Hacker News

Press · 30 Jan 2024, 08:00 · Juniper Networks Releases Urgent Junos OS Updates for High-Severity Flaws - The Hacker News

The Register

Press · 30 Jan 2024, 08:00 · Juniper apologizes for jumbled vulnerability disclosure - The Register

Cybersecurity Dive

Press · 15 Nov 2023, 08:00 · 5 Juniper CVEs actively exploited in the wild - Cybersecurity Dive

Help Net Security

Press · 14 Nov 2023, 08:00 · Juniper networking devices under attack - Help Net Security

See all 6 source documents

CCB Belgium

Press · 27 Sep 2023, 07:00 · Warning: Remote Code Execution vulnerability in J-Web of Juniper Networks Junos OS on EX Series and SRX Series, POC available, Patch Immediately! | CCB Belgium - CCB Belgium

Score evolution

● Hype ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 7.8 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence: Exploitation recorded
Priority basis: Recorded exploitation; CVSS 5.3; EPSS 1.1%
Attention, last 30 days: 0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential: network access, no prior privileges, no user interaction.
Observed activity: Exploitation recorded in CISA KEV.
Known scale: Not quantified.
Evidence confidence basis: Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:56.083638+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline

Published

26 Sep 2023, 19:53

First press mention

27 Sep 2023, 07:00

Added to the CISA KEV catalog

13 Nov 2023, 00:00

Latest press mention

30 Jan 2024, 08:00

Score calculated

05 Nov 2026, 13:58