CVE-2026-113364 Buffer Overflow in the data receiving process in NEC Corporation WebSAM WinShare Ver 7.5.0 and earlier, Ver 7.6.0 and Ver 7.7.0 through 7.7.2 on Windows allows a remote unauthenticated attacker to exe...

CriticalCVSS 9.3

Published: 2026-11-09 06:14
Updated: 2026-11-10 16:09
Exploit status: No public exploit known

Description

Buffer Overflow in the data receiving process in NEC Corporation WebSAM WinShare Ver 7.5.0 and earlier, Ver 7.6.0 and Ver 7.7.0 through 7.7.2 on Windows allows a remote unauthenticated attacker to execute arbitrary code with SYSTEM privileges via a crafted packet with a malformed data size value in the protocol header.

Affected products

Product	Affected versions	Fixed in
nec WebSAM WinShare	= Ver 7.5.0 and earlier, Ver 7.6.0 and Ver 7.7.0 through 7.7.2	No fix listed

References

jpn.nec.com

CVSS v4.0

9.3 Critical

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: None
Vulnerable System Confidentiality: High
Vulnerable System Integrity: High
Vulnerable System Availability: High
Subsequent System Confidentiality: None
Subsequent System Integrity: None
Subsequent System Availability: None

Weakness & likelihood

EPSS (exploitation probability, 30 days): Not available
CWE: CWE-122 Heap-based buffer overflow

Public exploit references

Metadata only. CVERadar never hosts or runs exploit code.

No public exploit references known.