CVE-2026-92239
Buffer overrun in IMAP
HIGH
8.1
CVSS Score
Published: September 15, 2026 at 07:42 PM UTC
Updated: September 24, 2026 at 02:27 PM UTC
1 product affected across 1 vendorThunderbird
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Severity
HIGH8.1
Exploit prediction
EPSS 0.4%
SSVC
No known exploit
Description
A maliciously constructed IMAP line could cause an out-of-bounds buffer read. This vulnerability was fixed in Thunderbird 140.16.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 140.16.0141.0 ≤ v < 153.3.0154.0 ≤ v < 156.0
Vendor states this is fixed in 140.16 (unaffected)
Affected range stops below 140.16.0, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 153.3 (unaffected)
Affected range stops below 153.3.0, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 156 (unaffected)
Affected range stops below 156.0, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (4)
SSVC — Action Prioritization
SSVCNo known exploitNot automatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
8.1HIGHCISA-ADP
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusANALYZED
CWE
CWE-125
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