← Vulnerability feed

Vulnerability record · CVE-2026-9621 · published 1 September 2026

CVE-2026-9621: Integer overflow vulnerability

A denial-of-service security issue exists within RSLinx® Classic. The security issue stems from improper handling of a malformed packet. A crafted CIP packet can cause the RSLinx® Classic service to crash, requiring a restart of the service to recover

9.2 CVSS 4.0 Critical EPSS 0.43% · top 65.5% CWE-190 · Integer overflow Awaiting Analysis
9.2CVSS 4.0 base score
0.43%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
1 Sep 2026Last modified by NVD

Description

A denial-of-service security issue exists within RSLinx® Classic. The security issue stems from improper handling of a malformed packet. A crafted CIP packet can cause the RSLinx® Classic service to crash, requiring a restart of the service to recover

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://www.rockwellautomation.com/en-us/trust-center/security-advisories/advisory.SD1794.html

Track CVE-2026-9621 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.4CVE-2025-48595Android Framework integer overflow enables local code executionAn integer overflow in multiple locations of the Android Framework can be turned into code execution. It allows a local attacker to escalate privileg…KEVEPSS 1.7%analysed7.8CVE-2021-30952Apple WebKit integer overflow allows code execution via crafted web contentAn integer overflow in Apple's WebKit engine was fixed by improved input validation across tvOS 15.2, macOS Monterey 12.1, Safari 15.2, iOS/iPadOS 15…KEVEPSS 7.0%analysed7.8CVE-2026-21385Qualcomm chipset firmware memory corruption via alignment integer overflowA memory corruption flaw in Qualcomm chipset firmware arises from an integer overflow when alignments are used for memory allocation (CWE-190). It af…KEVEPSS 1.2%analysed7.8CVE-2018-14634Linux kernel create_elf_tables() integer overflow privilege escalationAn integer overflow in the Linux kernel's create_elf_tables() function lets an unprivileged local user escalate privileges when a SUID or otherwise p…KEVEPSS 15%analysed7.8CVE-2025-24985Windows Fast FAT Driver integer overflow enables local code executionThe Windows Fast FAT driver contains an integer overflow that leads to a heap-based buffer overflow. A crafted FAT filesystem operation can corrupt h…KEVEPSS 3.8%analysed8.4CVE-2022-0185Linux Kernel Filesystem Context Heap Buffer OverflowThe legacy_parse_param function in the Linux kernel's Filesystem Context functionality fails to properly verify supplied parameter lengths, causing a…KEVEPSS 25%analysed7.8CVE-2024-38080Windows Hyper-V elevation of privilege via integer overflowCVE-2024-38080 is an elevation of privilege flaw in Microsoft Windows Hyper-V, tied to an integer overflow (CWE-190) per the CWE mapping, though NVD …KEVEPSS 7.1%analysed7.8CVE-2023-33107Qualcomm Graphics Linux integer overflow memory corruptionCVE-2023-33107 is an integer overflow (CWE-190) in Qualcomm Graphics Linux that causes memory corruption when a shared virtual memory region is assig…KEVEPSS 0.89%analysed

Source: NIST National Vulnerability Database (record CVE-2026-9621), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.