CVE-2019-6553: rockwell automation rslinx classic® Stack-based Buffer Overflow
Vulnerability summary
CVE-2019-6553 is a critical (CVSS 9.8) Stack-based Buffer Overflow vulnerability in rockwell automation rslinx classic®. EPSS estimates a 66.34% chance of exploitation in the next 30 days, higher than 99.2% of scored vulnerabilities.
Timeline
- 04-04-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A vulnerability was found in Rockwell Automation RSLinx Classic versions 4.10.00 and prior. An input validation issue in a .dll file of RSLinx Classic where the data in a Forward Open service request is passed to a fixed size buffer, allowing an attacker to exploit a stack-based buffer overflow condition.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
66.34%
Chance of exploitation in the next 30 days
Percentile
99%
Versus all other CVEs
30-day change
+6.25 pp
From 60.09% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
Affected systems
Rockwell automation1 product
- rslinx classic®4.10.00 and prior
Rockwellautomation1 product
- rslinx≤ 4.10.00
2 vendors · 2 products
References
1 links- ics-cert.us-cert.gov/advisories/ICSA-19-064-01X Refsource MISCThird Party AdvisoryUS Government Resource