CVE-2026-100801 (GCVE-0-2026-100801)

Vulnerability from cvelistv5 – Published: 2026-09-29 12:36 – Updated: 2026-10-27 18:27
VLAI
Title
Privilege escalation in the DLL Services component
Summary
Privilege escalation in the DLL Services component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 159, Firefox ESR 153.6, Thunderbird 159, Thunderbird 153.6, Firefox 157, and Firefox ESR 140.17.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 00:00 UTC
CWE
  • CWE-269 - Improper Privilege Management
Assigner
mozilla CNA under the mitre root
CNA scorecard E 38/100 over 683 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Mozilla Thunderbird Unaffected: 140.17 , ≤ 140.* (rpm)
Unaffected: 153.4 , ≤ 153.* (rpm)
Unaffected: 153.6 , ≤ 153.* (rpm)
Unaffected: 157 , ≤ 157.* (rpm)
Unaffected: 159 , ≤ * (rpm)
guessed Create a notification for this product.
Mozilla Firefox Unaffected: 140.17 , ≤ 140.* (rpm)
Unaffected: 153.4 , ≤ 153.* (rpm)
Unaffected: 153.6 , ≤ 153.* (rpm)
Unaffected: 157 , ≤ 157.* (rpm)
Unaffected: 159 , ≤ * (rpm)
guessed Create a notification for this product.
Credits
Mozilla
Show details on NVD website
To clipboard 

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Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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

Author Source Type Date Other

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

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.