CVE catalog
CVE-2026-115723
UBUNTU-CVE-2026-115723
- Severity
- Unknown
- Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.42% · Oct 27, 2026
Snap7 through 1.4.3 contains an out-of-bounds write vulnerability in the passive partner that allows a malicious active partner to overflow application buffers by declaring an unvalidated BSend total length. Attackers connecting from the configured peer address can declare up to 65535 bytes and send a short fragment, causing BRecv to memcpy past the buffer and crash or corrupt SCADA, HMI or gateway processes.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Ubuntu | snap7 | 26.10 | 1.4.2+dfsg-1build1 | vulnerable |
| Ubuntu | snap7 | 26.04 | 1.4.2+dfsg-1 | vulnerable |
| Ubuntu | snap7 | 26.04 | 1.4.2+dfsg-1build1 | vulnerable |
Fixed-version evidence
OpenFactory catalog packages
No matching packages in this catalog.
Observed: