Exploitation evidence
Known exploited · CISA KEV listed
Added 2023-11-13. Ransomware campaign use: Unknown.
CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA due date: 2023-11-17. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
Juniper Networks / Junos OS
Default status: unaffected
- affected: 0 to < 20.4R3-S9 (semver)
- affected: 21.1 to < 21.1* (semver)
- affected: 21.2 to < 21.2R3-S7 (semver)
- affected: 21.3 to < 21.3R3-S5 (semver)
- affected: 21.4 to < 21.4R3-S5 (semver)
- affected: 22.1 to < 22.1R3-S4 (semver)
- affected: 22.2 to < 22.2R3-S2 (semver)
- affected: 22.3 to < 22.3R2-S2, 22.3R3-S1 (semver)
- affected: 22.4 to < 22.4R2-S1, 22.4R3 (semver)
- affected: 23,2 to < 23.2R1-S1, 23.2R2 (semver)
Fixes and workarounds
The following software releases have been updated to resolve this specific issue: 20.4R3-S9*, 21.2R3-S7*, 21.3R3-S5, 21.4R3-S5*, 22.1R3-S4*, 22.2R3-S2, 22.3R2-S2, 22.3R3-S1*, 22.4R2-S1, 22.4R3*, 23.2R1-S1, 23.2R2*, 23.4R1*, and all subsequent releases. *Pending Publication
Reported workarounds: Disable J-Web, or limit access to only trusted hosts.
Sources and related reporting
CVE Program record ↗ · Download tracked evidence as JSON
- https://supportportal.juniper.net/JSA72300
- http://packetstormsecurity.com/files/174865/Juniper-SRX-Firewall-EX-Switch-Remote-Code-Execution.html
- http://packetstormsecurity.com/files/176969/Juniper-SRX-Firewall-EX-Switch-Remote-Code-Execution.html
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36845
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.9507,
"percentile": 0.99864
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.9507,
"percentile": 0.99863
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.9507,
"percentile": 0.99863
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.9507,
"percentile": 0.99862
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.9507,
"percentile": 0.99862
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.9507,
"percentile": 0.99862
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.9507,
"percentile": 0.99862
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.9507,
"percentile": 0.99862
}04 Nov 2026, 18:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
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"title": "Junos OS: EX and SRX Series: A PHP vulnerability in J-Web allows an unauthenticated to control an important environment variable",
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"datePublished": "2023-08-17T19:17:57.183Z",
"dateReserved": "2023-06-27T16:17:25.277Z",
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}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.9507,
"percentile": 0.99862
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.9507,
"percentile": 0.99862
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2023-36845",
"cwes": [
"CWE-473"
],
"dateAdded": "2023-11-13",
"dueDate": "2023-11-17",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://supportportal.juniper.net/s/article/2023-08-Out-of-Cycle-Security-Bulletin-Junos-OS-SRX-Series-and-EX-Series-Multiple-vulnerabilities-in-J-Web-can-be-combined-to-allow-a-preAuth-Remote-Code-Execution?language=en_US ; https://nvd.nist.gov/vuln/detail/CVE-2023-36845",
"product": "Junos OS",
"requiredAction": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
"shortDescription": "Juniper Junos OS on EX Series and SRX Series contains a PHP external variable modification vulnerability that allows an unauthenticated, network-based attacker to control an important environment variable. Using a crafted request, which sets the variable PHPRC, an attacker is able to modify the PHP execution environment allowing the injection und execution of code.",
"vendorProject": "Juniper",
"vulnerabilityName": "Juniper Junos OS EX Series and SRX Series PHP External Variable Modification Vulnerability"
}