CVE-2026-3509

CWE-134 — Uncontrolled Format String3 documents3 sources
Severity
7.5HIGH
EPSS
0.1%
top 71.16%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
15
Codesys Codesys Control FOR Beaglebone SLCodesys Codesys Control FOR Empc-a/imx6 SLCodesys Codesys Control FOR Iot2000 SL+12 more
Timeline
PublishedMar 24

Description

An unauthenticated remote attacker may be able to control the format string of messages processed by the Audit Log of the CODESYS Control runtime system, potentially resulting in a denial‑of‑service (DoS) condition.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages15 packages

▶CVEListV5codesys/codesys_control_rte_(sl)3.5.17.0 — 3.5.22.0
▶CVEListV5codesys/codesys_control_win_(sl)3.5.17.0 — 3.5.22.0
▶CVEListV5codesys/codesys_virtual_control_sl4.1.0.0 — 4.21.0.0
▶CVEListV5codesys/codesys_control_for_linux_sl4.1.0.0 — 4.21.0.0
▶CVEListV5codesys/codesys_control_for_pfc100_sl4.1.0.0 — 4.21.0.0

🔴Vulnerability Details

2
CVEList
CODESYS Control Audit Log Format String DoS↗2026-03-24
▶
GHSA
GHSA-34rr-qp2j-p4q7: An unauthenticated remote attacker may be able to control the format string of messages processed by the Audit Log of the CODESYS Control runtime syst↗2026-03-24
▶
CVE-2026-3509 (HIGH CVSS 7.5) | An unauthenticated remote attacker | cvebase.io