Is CVE-2014-0777 being actively exploited?

CVE-2014-0777 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2014-0777?

CVE-2014-0777 has a CVSS 2.0 base score of 8.3 (HIGH).

CVE-2014-0777

HIGH · CVSS 8.3EPSS 2.4%EU EUVD

The Modbus slave/outstation driver in the OPC Drivers 1.0.20 and earlier in IOServer OPC Server allows remote attackers to cause a denial of service (out-of-bounds read and daemon crash) via a crafted packet.

Key facts

CVSS score: 8.3 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:M/Au:N/C:P/I:P/A:C
Weakness (CWE): CWE-125
EPSS score: 2.4% (84th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2014-0808)
Published: April 11, 2014
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2014-0808 in the EU Vulnerability Database. Last updated in EUVD on September 24, 2025.

View on the EU Vulnerability Database

Affected products

ioserver / ioserver opc server
ioserver / opc drivers

References

http://ics-cert.us-cert.gov/advisories/ICSA-14-100-01(US Government Resource)
http://www.ioserver.com/
https://www.cisa.gov/news-events/ics-advisories/icsa-14-100-01

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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