CVE-2026-12221
Essential information
- Published
- 15/06/2026 08:16
- Modified
- 15/06/2026 20:42
- Author
- The MITRE Corporation
- Creator
- The MITRE Corporation
- CVSS
- 7.7 (v2) 8.0 HIGH (v3.1) 8.6 HIGH (v4.0)
- CISA KEV
- No
- CWE
- CWE-119
- CVSS vector
-
AV:A/AC:L/Au:S/C:C/I:C/A:CCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HCVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS metrics
- Access vector
- Adjacent Network
- Access complexity
- Low
- Authentication
- Single
- Confidentiality impact
- Complete
- Integrity impact
- Complete
- Availability impact
- Complete
- Exploitability
- —
- Remediation level
- —
- Report confidence
- —
- Temporal score
- —
- Attack vector
- Adjacent
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
- Exploit code maturity
- —
- Remediation level
- —
- Report confidence
- —
- Temporal score
- —
- Attack vector
- Adjacent
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- Low
- User interaction
- None
- Confidentiality (V)
- High
- Confidentiality (S)
- None
- Integrity (V)
- High
- Integrity (S)
- None
- Availability (V)
- High
- Availability (S)
- None
- Exploit maturity
- PROOF_OF_CONCEPT
Description
A vulnerability was found in Yealink SIP-T46U 108.86.0.118. This impacts the function sprintf of the file /api/upgrade/upgrade of the component Firmware Chunk Upload Handler. Performing a manipulation of the argument uid/start_offset results in stack-based buffer overflow. The attack needs to be approached within the local network. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
NVD status
- Status
- Deferred — CVE has been recently published to the CVE List and has been received by the NVD.
- Source
- [email protected]
- NVD
- View on NVD
Affected products (CPE)
| Product | CPE |
|---|---|
| yealink / sip-t46u | cpe:2.3:a:yealink:sip-t46u:108.86.0.118:*:*:*:*:*:*:* |