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Fencer Intel
critical 10.0

CVE-2011-3142 in the critical feed json

Stack-based buffer overflow in an ActiveX control in KVWebSvr.dll in WellinTech KingView 6.52 and 6.53 allows remote attackers to execute a…

published 2011-08-16 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-3110

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
38.4%
EPSS 38.4% chance of exploitation in 30 days, percentile 98%
public exploits
1
Exploit-DB

Summary

Stack-based buffer overflow in an ActiveX control in KVWebSvr.dll in WellinTech KingView 6.52 and 6.53 allows remote attackers to execute arbitrary code via a long second argument to the ValidateUser method.

Patch / fix

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-11-074-01 updated cvss 9.8

WellinTech KingView 6.53 KVWebSvr ActiveX

  • WellinTech KingView V6.53
    affected: mitigation

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Timeline

  1. First public exploit (EDB-16936)
  2. Published

Exploit prediction

38.36% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-16936 KingView 6.5.3 SCADA - ActiveX remote, 2011-03-07
  • securityfocus.com http://www.securityfocus.com/bid/46757 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.