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CVE-2023-36846

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 user.php that doesn't require authentication …

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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 user.php that doesn't require authentication an attacker is able to upload arbitrary files via J-Web, leading to a loss of integrity for a certain  part of the file system, which may allow chaining to other vulnerabilities. This issue affects Juniper Networks Junos OS on SRX Series: * All versions prior to 20.4R3-S8; * 21.1 versions 21.1R1 and later; * 21.2 versions prior to 21.2R3-S6; * 21.3 versions prior to 21.3R3-S5; * 21.4 versions prior to 21.4R3-S5; * 22.1 versions prior to 22.1R3-S3; * 22.2 versions prior to 22.2R3-S2; * 22.3 versions prior to 22.3R2-S2, 22.3R3; * 22.4 versions prior to 22.4R2-S1, 22.4R3.
CVSS 5.3 (MEDIUM) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.3/10
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: 93.47%: +0.47

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

Sources: 11 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

The Hacker News
Press · 30 Jan 2024, 08:00 · Juniper Networks Releases Urgent Junos OS Updates for High-Severity Flaws - The Hacker News
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
Security Affairs
Press · 19 Sep 2023, 07:00 · 12,000 Juniper SRX firewalls and EX switches vulnerable to CVE-2023-36845 - Security Affairs
BleepingComputer
Press · 18 Sep 2023, 07:00 · Thousands of Juniper devices vulnerable to unauthenticated RCE flaw - BleepingComputer
Rapid7
Press · 31 Aug 2023, 07:00 · Exploitation of Juniper Networks SRX Series and EX Series Devices - Rapid7
See all 11 source documents
BleepingComputer
Press · 28 Aug 2023, 07:00 · Exploit released for Juniper firewall bugs allowing RCE attacks - BleepingComputer
Help Net Security
Press · 28 Aug 2023, 07:00 · PoC for no-auth RCE on Juniper firewalls released - Help Net Security
watchTowr Labs
Press · 25 Aug 2023, 07:00 · CVE-2023-36844 And Friends: RCE In Juniper Devices - watchTowr Labs
Hong Kong Computer Emergency Response Team Coordination Centre
Press · 21 Aug 2023, 07:00 · Juniper Junos OS Multiple Vulnerabilities - Hong Kong Computer Emergency Response Team Coordination Centre
iTnews
Press · 21 Aug 2023, 07:00 · Juniper web management interface open to RCE - iTnews
The Hacker News
Press · 19 Aug 2023, 07:00 · New Juniper Junos OS Flaws Expose Devices to Remote Attacks - Patch Now - The Hacker News

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 8.3 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

0

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 93.5%
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
17 Aug 2023, 19:18
First press mention
19 Aug 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