Exploitation evidence
Known exploited · CISA KEV listed
Added 2026-10-02. Ransomware campaign use: Unknown.
CISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CISA due date: 2026-10-05. 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
Zammad GmbH / Zammad
Default status: unaffected
- unknown: * to < 6.3.0 (semver)
- affected: 6.3.0 to < 6.5.4 (semver)
- unknown: 7.0.0 to < 7.1.3 (semver)
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
CVE Program record ↗ · Download tracked evidence as JSON
- https://csirt.divd.nl/DIVD-2026-00015
- https://csirt.divd.nl/CVE-2026-102489
- https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490
- https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102489
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": 0.49915,
"percentile": 0.98917
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.49915,
"percentile": 0.9891
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.49915,
"percentile": 0.98909
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.49915,
"percentile": 0.98908
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.49915,
"percentile": 0.98907
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.22478,
"percentile": 0.97713
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.22478,
"percentile": 0.97716
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.22478,
"percentile": 0.97715
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.22478,
"percentile": 0.9771
}03 Nov 2026, 12:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-102489",
"options": [
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},
{
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},
{
"Technical Impact": "total"
}
],
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"timestamp": "2026-10-02T00:00:00+00:00",
"version": "2.0.3"
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},
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"content": {
"dateAdded": "2026-10-02",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102489"
},
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}
}
],
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"descriptions": [
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],
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"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102489"
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"title": "CISA ADP Vulnrichment"
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"cna": {
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"platforms": [
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"Docker"
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},
{
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},
{
"lessThan": "7.1.3",
"status": "unknown",
"version": "7.0.0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Earth Grob (Merlon Security)"
},
{
"lang": "en",
"type": "finder",
"value": "Luke Paris (Merlon Security)"
},
{
"lang": "en",
"type": "finder",
"value": "Tijmen van der Spijk (Merlon Security)"
},
{
"lang": "en",
"type": "finder",
"value": "Zohar Cochavi (Merlon Security)"
},
{
"lang": "en",
"type": "finder",
"value": "Alje Woltjer (Merlon Security)"
},
{
"lang": "en",
"type": "finder",
"value": "Mischa Rick van Geelen (DIVD)"
},
{
"lang": "en",
"type": "finder",
"value": "Ralph Horn (DIVD)"
},
{
"lang": "en",
"type": "finder",
"value": "Max van der Horst (DIVD)"
},
{
"lang": "en",
"type": "analyst",
"value": "Victor Pasman (DIVD)"
},
{
"lang": "en",
"type": "analyst",
"value": "Frank Breedijk (DIVD)"
},
{
"lang": "en",
"type": "remediation developer",
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],
"datePublic": "2026-09-29T20:00:00.000Z",
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}
],
"value": "Zammad versions 6.3.0 to 6.5.4 are vulnerable a session hijack vulnerability that leads to remote code execution as the zammad user. The bug is also present in version 7.0.0 to version 7.1.2, but not exploitable due to changes in the underlying framework."
}
],
"metrics": [
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"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"exploitMaturity": "ATTACKED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "LOW",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "LOW",
"userInteraction": "PASSIVE",
"valueDensity": "CONCENTRATED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:A/AU:Y/V:C",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
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},
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"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
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"vulnerabilityResponseEffort": "NOT_DEFINED"
},
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"scenarios": [
{
"lang": "en",
"value": "Chained with CVE-2026-102490"
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],
"providerMetadata": {
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"references": [
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},
{
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],
"url": "https://csirt.divd.nl/CVE-2026-102489"
},
{
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],
"url": "https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490"
},
{
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],
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}
],
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"discovery": "INTERNAL"
},
"tags": [
"unsupported-when-assigned",
"x_known-exploited-vulnerability",
"x_open-source"
],
"title": "Undisclosed RCE in Zammad v6.3 and higher",
"x_generator": {
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},
"cveMetadata": {
"assignerOrgId": "b87402ff-ae37-4194-9dae-31abdbd6f217",
"assignerShortName": "DIVD",
"cveId": "CVE-2026-102489",
"datePublished": "2026-09-30T16:21:19.937Z",
"dateReserved": "2026-09-29T09:46:12.490Z",
"dateUpdated": "2026-10-19T09:10:59.656Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
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}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.22478,
"percentile": 0.97706
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2026-102489",
"cwes": [
"CWE-384"
],
"dateAdded": "2026-10-02",
"dueDate": "2026-10-05",
"forensicTriage": "Yes",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://zammad.com/en/product/releases/ ; https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-102489",
"product": "Zammad",
"requiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
"shortDescription": "Zammad GmbH Zammad contains a session fixation vulnerability that can lead to remote code execution as the zammad user. This vulnerability can be chained with CVE-2026-102490.",
"vendorProject": "Zammad GmbH",
"vulnerabilityName": "Zammad GmbH Zammad Session Fixation Vulnerability"
}