8.8
High
CVE-2026-100801 Privilege escalation in the DLL Services component
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 159 | earliest → < 159 | 159 |
| Firefox 157 | earliest → < 157 | 157 |
| Firefox 153.6 | earliest → < 153.6 | 153.6 |
| Firefox 153.4 | earliest → < 153.4 | 153.4 |
| Firefox 140.17 | earliest → < 140.17 | 140.17 |
| Thunderbird 159 | earliest → < 159 | 159 |
| Thunderbird 157 | earliest → < 157 | 157 |
| Thunderbird 153.6 | earliest → < 153.6 | 153.6 |
| Thunderbird 153.4 | earliest → < 153.4 | 153.4 |
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| Product | Affected versions | Fixed in |
|---|---|---|
| Thunderbird 140.17 | earliest → < 140.17 | 140.17 |