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CVE-2019-6553

59
FAUCET Score

CVE-2019-6553 is a critical stack-based buffer overflow vulnerability affecting Rockwell Automation RSLinx Classic versions 4.10.00 and prior. An input validation flaw in a .dll file allows an attacker to send a crafted Forward Open service request, leading to a buffer overflow. With a CVSS score of 9.8, this vulnerability is highly severe, allowing for complete compromise of confidentiality, integrity, and availability with no user interaction or authentication required. While there is no known active exploitation or public exploit code, the vulnerability has garnered some community discussion and media coverage, indicating awareness within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.10.00CPE matchmatch criteria
cpe:2.3:a:rockwellautomation:rslinx:*:*:*:*:classic:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
50.03%
Probability of exploitation in next 30 days
EPSS Percentile
98.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.5003 is in the 96th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (5)

aristavendor investigatingvia llm_extracted
opencartvendor investigatingvia llm_extracted
payloadcmsvendor investigatingvia llm_extracted
qlikvendor investigatingvia llm_extracted
safarivendor investigatingvia llm_extracted

Vendor Advisories (5)

aristallm-arista-208c79d1a0b69701CRITICAL

RSLinx Classic Stack Buffer Overflow

Mar 4, 2019
opencartllm-opencart-f8a51db70094db37CRITICAL

RSLinx Classic Stack Buffer Overflow

Mar 4, 2019
safarillm-safari-453facd06756aaf9CRITICAL

RSLinx Classic Stack Buffer Overflow

Mar 4, 2019
payloadcmsllm-payloadcms-b990aeb31362d5b5CRITICAL

RSLinx Classic Stack Buffer Overflow

Mar 4, 2019
qlikllm-qlik-5bb2d6e165e91265CRITICAL

RSLinx Classic Stack Buffer Overflow

Mar 4, 2019

References

ics-cert.us-cert.gov / advisories/ICSA-19-064-01
Third Party AdvisoryUS Government Resource