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CVE-2026-102490

HIGH 8.5 KNOWN EXPLOITED

Published 2026-09-30 · Last modified 2026-10-08

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.

ACTIVELY EXPLOITED

Confirmed exploited in the wild — in CISA KEV since 2026-10-02. Patch or mitigate now.

Exploitation likelihood

0.9%chance of exploitation in 30 days · 58th percentile

● In CISA KEV (2026-10-02) ○ Catalogued PoC

Impact if exploited

8.5CVSS 4.0 · HIGH

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityHigh

What an attacker needs

  • ⚠Access: Requires local access to the host
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable
  • ✓Requirements: No special attack requirements

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

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Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Zammad Gmbh Zammad Docker Linux

Products Zammad Docker Linux Kernel

Weakness (CWE)

  • CWE-269: Improper Privilege Management

CVSS vector

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

References and research data (JSON)

Additional exploitation reports

Source-specific reports, separate from CISA KEV. Repeated observations from one source are not independent confirmations.

  • ENISA EU KEV · 2026-09-30EUVD · EUVD-2026-90081
  • VulnCheck KEV · 2026-09-30T00:00:00Z

    Source guidance: 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.

    Source ransomware assessment: Unknown

    VulnCheck KEV · CVE-2026-102490 · Updated 2026-09-30T00:00:00Z
  • VulnCheck KEV · 2026-09-30T00:00:00ZVulnCheck KEV · CVE-2026-102490
    VulnCheck KEV · CVE-2026-102490
    VulnCheck KEV · CVE-2026-102490
  • VulnCheck KEV · 2026-10-02T00:00:00ZVulnCheck KEV · CVE-2026-102490

Known Affected Software Configurations

VendorProductVersion range
ZammadZammad< 7.2.2

All CVSS metrics

  • HIGH 8.5 v4.0 · CNA Primary
    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
  • CRITICAL 9.4 v4.0 · CNA Primary
    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
  • CRITICAL 9.4 v4.0 · NVD Secondary
    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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:C/RE:X/U:X
  • HIGH 7.8 v3.1 · NVD Primary
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS