CVE-2026-54410
Essential information
- Published
- 14/06/2026 20:17
- Modified
- 14/06/2026 18:17
- Author
- The MITRE Corporation
- Creator
- The MITRE Corporation
- CVSS
- 9.0 (v2) 8.6 HIGH (v3.1) 8.8 HIGH (v4.0)
- CISA KEV
- No
- CWE
- CWE-193
- CVSS vector
-
AV:N/AC:L/Au:N/C:P/I:P/A:CCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:HCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
CVSS metrics
- Access vector
- Network
- Access complexity
- Low
- Authentication
- None
- Confidentiality impact
- Partial
- Integrity impact
- Partial
- Availability impact
- Complete
- Exploitability
- —
- Remediation level
- —
- Report confidence
- —
- Temporal score
- —
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- Low
- Integrity impact
- Low
- Availability impact
- High
- Exploit code maturity
- —
- Remediation level
- —
- Report confidence
- —
- Temporal score
- —
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- None
- User interaction
- None
- Confidentiality (V)
- Low
- Confidentiality (S)
- None
- Integrity (V)
- Low
- Integrity (S)
- None
- Availability (V)
- High
- Availability (S)
- None
- Exploit maturity
- PROOF_OF_CONCEPT
Description
nanoMODBUS through v1.23.0 contains an off-by-one buffer overflow in the recv_msg_header() function of the Modbus/TCP server that allows remote unauthenticated attackers to write one attacker-controlled byte past the end of the 260-byte receive buffer by sending a crafted MBAP frame whose Length field is set to 255. The overflow corrupts the adjacent buffer-index field of the nanoMODBUS state structure, resulting in denial of service through invalid memory accesses and, on bare-metal and RTOS targets without memory protection, one-byte information disclosure and writes to unintended register addresses on the Write Multiple Registers (FC16) handler path.
NVD status
- Status
- Received — CVE has been recently published to the CVE List and has been received by the NVD.
- Source
- 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
- NVD
- View on NVD
Affected products (CPE)
| Product | CPE |
|---|---|
| nanomodbus / nanomodbus | cpe:2.3:a:nanomodbus:nanomodbus:1.23.0:*:*:*:*:*:*:* |