CRITICALVulnerability
CVE-2026-74989
Internally found bugs present in Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154 and Thunderbird 154.
Properties
- severity
- CRITICAL
- score
- 9.8
- epss_score
- 0.00332
- cve_id
- CVE-2026-74989
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- published_at
- 2026-08-18T13:17:40.810
- last_modified
- 2026-09-01T22:17:12.353
- epss_percentile
- 0.25812
Related Entities (5)
ENRICHED_BY (1)
→[Source]FIRST EPSS
AFFECTS_PRODUCT (2)
→[Product]
→[Product]
DESCRIBED_BY (1)
→[Source]NVD
HAS_WEAKNESS (1)
→[Weakness]Improper Restriction of Operations within the Bounds of a Memory Buffer
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