How severe is CVE-2021-29242?

CVE-2021-29242 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2021-29242 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-29242?

CVE-2021-29242 primarily affects Codesys Control For Beaglebone Sl. In total, 24 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-29242?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-29242 published?

CVE-2021-29242 was published on 2021-05-03 and last updated on 2026-06-17.

CVE-2021-29242

CVE-2021-29242 is a high-severity vulnerability in Codesys Control For Beaglebone Sl with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 7.5
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Codesys Control For Beaglebone Sl
Published: 2021-05-03
Last modified: 2026-06-17

Description

CODESYS Control Runtime system before 3.5.17.0 has improper input validation. Attackers can send crafted communication packets to change the router's addressing scheme and may re-route, add, remove or change low level communication packages.

Frequently asked questions

What is CVE-2021-29242?: CODESYS Control Runtime system before 3.5.17.0 has improper input validation. Attackers can send crafted communication packets to change the router's addressing scheme and may re-route, add, remove or change low level communication packages.
How severe is CVE-2021-29242?: CVE-2021-29242 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2021-29242 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-29242?: CVE-2021-29242 primarily affects Codesys Control For Beaglebone Sl. In total, 24 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-29242?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-29242 published?: CVE-2021-29242 was published on 2021-05-03 and last updated on 2026-06-17.

References

Affected products (24)

cpe:2.3:a:codesys:control_for_beaglebone_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_for_empc-a\/imx6_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_for_iot2000_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_for_linux_arm_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_for_linux_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_for_pfc100_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_for_pfc200_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_for_plcnext_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_for_raspberry_pi_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_for_wago_touch_panels_600_sl:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_rte:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_rte:*:*:*:*:*:beckhoff_cx:*:*
cpe:2.3:a:codesys:control_runtime_system_toolkit:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:control_win:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:edge_gateway:*:*:*:*:*:windows:*:*
cpe:2.3:a:codesys:edge_gateway:*:*:*:*:*:linux:*:*
cpe:2.3:a:codesys:embedded_target_visu_toolkit:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:gateway:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:hmi:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:opc_server:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:plchandler:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:remote_target_visu_toolkit:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:safety_sil:*:*:*:*:*:*:*:*
cpe:2.3:a:codesys:simulation_runtime:*:*:*:*:*:*:*:*

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