CVE-2026-102490 (GCVE-0-2026-102490)

Vulnerability from cvelistv5 – Published: 2026-09-30 16:21 – Updated: 2026-10-08 19:55 X_Known Exploited Vulnerability X_Open Source
VLAI CISA ENISA Previdian
Title
Local privilege escalation in Zammad v1.5.0 to v7.2.2 installed via DEB or RPM package
Summary
Zammad packages built with packager.io (DEB and RPM) could have allowed a local attacker who already had file system write privileges as the unprivileged zammad service account to escalate to full root privileges on the host. Service processes began running as root and executed files that were owned and writable by the zammad account before dropping their identity to that account. An attacker holding that foothold could have escalated within seconds, because the affected services were restarted automatically whenever they stopped; no administrator interaction was required. Only installations from the DEB and RPM packages were affected — installations from source or the official container images were not. All released packaged versions were affected.
Severity
8.5 (High)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/AU:Y/V:D
9.4 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y/V:C
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 00:00 UTC
CWE
  • CWE-269 - Improper Privilege Management
Assigner
DIVD CNA under the ENISA root
CNA scorecard B 76/100 over 18 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Zammad GmbH Zammad Affected: 1.5.0 , < 7.2.2 (semver)
Unknown: * , < 1.5.0 (semver)
Unaffected: 7.2.2 , < * (semver)
guessed Create a notification for this product.
Date Public
2026-09-29 20:00
Credits
Earth Grob (Merlon Security) Luke Paris (Merlon Security) Tijmen van der Spijk (Merlon Security) Zohar Cochavi (Merlon Security) Alje Woltjer (Merlon Security) Mischa Rick van Geelen (DIVD) Ralph Horn (DIVD) Max van der Horst (DIVD) Victor Pasman (DIVD) Frank Breedijk (DIVD) Zammad
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 5d9b4456-52b6-4569-aab3-1b892655e6fc

Vulnerability ID: CVE-2026-102490

Status: Confirmed

Status Updated: 2026-10-02 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-10-02
Asserted: 2026-10-02
Scope
Notes: Zammad GmbH Zammad Improper Privilege Management Vulnerability | Affected: Zammad GmbH / Zammad | Description: Zammad GmbH Zammad contains an improper privilege management vulnerability that can allow the local zammad user to escalate privileges to root. This vulnerability can be chained with CVE-2026-102489. | 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. | Due date: 2026-10-05 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): 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-2026-102490
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-269
Feed CISA Known Exploited Vulnerabilities Catalog
Product Zammad
Due Date 2026-10-05
Date Added 2026-10-02
Vendorproject Zammad GmbH
Vulnerabilityname Zammad GmbH Zammad Improper Privilege Management Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-10-02 16:00 UTC | Updated: 2026-10-02 16:00 UTC
ENISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 36d66240-62ad-4373-b7ae-8efb8b2aad58

Vulnerability ID: CVE-2026-102490

Status: Confirmed

Status Updated: 2026-09-30 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-09-30
Asserted: 2026-09-30
Scope
Notes: Affected: Zammad / Zammad | Description: All versions of Zammad including the latest alpha enable the local zammad user to escalate privileges to root. | Exploitation type: unknown | Origin source: NCSC-NL | Notes: https://www.ncsc.nl/alerts/actief-misbruik-van-zeroday-kwetsbaarheden-in-zammad-update-nu
Evidence

Type: Csirt Report

Signal: Successful Exploitation

Confidence: 75%

Source: enisa-cnw-kev

Details
Cwes
Euvd EUVD-2026-90081
Notes https://www.ncsc.nl/alerts/actief-misbruik-van-zeroday-kwetsbaarheden-in-zammad-update-nu
Catalog ENISA / EU CSIRTs Network (CNW) KEV JSON
Product Zammad
Datereported 2026/09/30
Originsource NCSC-NL
Patchedsince
Vendorproject Zammad
Exploitationtype unknown
Vulnerabilityname
Threatactorsexploiting
References
Created: 2026-10-01 08:00 UTC | Updated: 2026-10-01 08:00 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 6d37c148-d0b5-4325-a0db-9e99aec79b39

Vulnerability ID: CVE-2026-102490

Status: Confirmed

Status Updated: 2026-09-30 18:53 UTC

Exploited: Yes

Timestamps
First Seen: 2026-09-30
Asserted: 2026-09-30
Scope
Notes: Local privilege escalation in Zammad v1.5.0 to v7.2.2 installed via DEB or RPM package | Affected: Zammad / Zammad | CVSS: 8.5 (HIGH) | EPSS: 0.10936 | Used in malware: unknown | Listed 2 days ahead of CISA KEV | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: previdian

Details
Feed Previdian (previdian.com)
Title Local privilege escalation in Zammad v1.5.0 to v7.2.2 installed via DEB or RPM package
Cve Id CVE-2026-102490
Vendor Zammad
Ghsa Id GHSA-HGFF-G8G3-4XR8
Product Zammad
Added Date 2026-09-30T18:53:04.428Z
Cvss Score 8.5
Epss Score 0.10936
Previous Ids
Cvss Severity HIGH
Virtual Patch False
Cvss Estimated False
Epss Percentile 0.9589
Used In Malware unknown
Vulnerability Id CVE-2026-102490
Ahead Of Cisa Kev 
{
  "count": 2,
  "unit": "day"
}
Not Yet In Cisa Kev False
References
Created: 2026-10-01 19:00 UTC | Updated: 2026-11-04 13:00 UTC
Show details on NVD website
To clipboard 

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            "tags": [
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            "url": "https://csirt.divd.nl/DIVD-2026-00015"
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            "tags": [
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            "url": "https://github.com/zammad/zammad/security/advisories/GHSA-p97w-927q-8vxq"
          },
          {
            "source": "csirt@divd.nl",
            "tags": [
              "Vendor Advisory"
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            "url": "https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490"
          },
          {
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            "tags": [
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            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102490"
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        ],
        "sourceIdentifier": "csirt@divd.nl",
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                "lang": "en",
                "value": "CWE-269"
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            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
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                    "id": "CVE-2026-102490",
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                "value": "CVE-2026-102490 added to CISA KEV"
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            "title": "CISA ADP Vulnrichment"
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            {
              "defaultStatus": "unaffected",
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              "lang": "en",
              "type": "finder",
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            },
            {
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            },
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            "discovery": "INTERNAL"
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            "x_open-source"
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        "dateReserved": "2026-09-29T09:46:12.490Z",
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        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Tags
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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