CVE-2026-115723 Snap7 - Buffer Overflow

Snap7 through 1.4.3 contains a buffer overflow caused by unvalidated BSend total length in the passive partner, letting malicious active partners overflow application buffers, exploit requires attacker to connect from configured peer address.

CVSS base score 7.4 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.62% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Denial Of Service, Data Tampering
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Published
23 October 2026
Updated
25 October 2026
Weakness
CWE-787

Vendor fix

Update to the latest version beyond 1.4.3.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs