Vulnerability details
CVE-2026-110249
Denial-of-service in the Exchange email component
CVSS 3.1
8.6High
Official description
A malicious, compromised, or MITM-controlled Exchange server can return a single well-formed SOAP response containing an element with enough attributes to keep Thunderbird's main thread CPU-bound for seconds to hours. This vulnerability was fixed in Thunderbird 158 and Thunderbird 153.5.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.6High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| No product information recorded. | |||
References and advisories
3
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Details
- Published
- 2026-10-13
- Last updated
- 2026-10-21
- State
- Published
- Assigner (CNA)
- mozilla
Exploit prediction (EPSS)
0.18%
Probability of exploitation in 30 days
7.5%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-400Uncontrolled Resource Consumption