CVE-2011-1563

Exp

Multiple stack-based buffer overflows in the HMI application in DATAC RealFlex RealWin 2.1 (Build 6.1.10.10) and earlier allow remote attackers to execute arbitrary code via (1) a long username in an On_FC_CONNECT_FCS_LOGIN packet, and crafted (2) On_FC_CTAGLIST_FCS_CADDTAG, (3) On_FC_CTAGLIST_FCS_CDELTAG, (4) On_FC_CTAGLIST_FCS_ADDTAGMS, (5) On_FC_RFUSER_FCS_LOGIN, (6) unspecified "On_FC_BINFILE_FCS_*FILE", (7) On_FC_CGETTAG_FCS_GETTELEMETRY, (8) On_FC_CGETTAG_FCS_GETCHANNELTELEMETRY, (9) On_FC_CGETTAG_FCS_SETTELEMETRY, (10) On_FC_CGETTAG_FCS_SETCHANNELTELEMETRY, and (11) On_FC_SCRIPT_FCS_STARTPROG packets to port 910.

Published: 2011-04-05 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1563 is rated High Exploit Risk (90.9/100): CVSS Critical severity, with high exploitation likelihood (EPSS 59.04%, 98th percentile). 8 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.51% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2011-1563

EDB-ID Source Kind Published Link
17025 exploit_db edb 2011-03-22 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
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— nvd_ref exploit_tag Exploit-DB ↗
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Exploit prediction scoring system (EPSS) score for CVE-2011-1563

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-29 57.53% 59.04% +1.51%
2 2025-12-13 58.37% 57.53% -0.84%
3 2025-03-30 — 58.37% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1563

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2011-1563

Affected software / configurations for CVE-2011-1563

Vendor Product Version Raw CPE
realflex realwin <= 2.1 cpe:2.3:a:realflex:realwin:*:*:*:*:*:*:*:*
realflex realwin 1.06 cpe:2.3:a:realflex:realwin:1.06:*:*:*:*:*:*:*
realflex realwin 2.0 cpe:2.3:a:realflex:realwin:2.0:*:*:*:*:*:*:*

References for CVE-2011-1563

cvelogic Threat Intelligence