CVE & CISA-KEV Catalog

CVE-2021-27477

HIGH
7.5
CVSS v3
NVD

Description

When JTEKT Corporation TOYOPUC PLC versions PC10G-CPU, 2PORT-EFR, Plus CPU, Plus EX, Plus EX2, Plus EFR, Plus EFR2, Plus 2P-EFR, PC10P-DP, PC10P-DP-IO, Plus BUS-EX, Nano 10GX, Nano 2ET,PC10PE, PC10PE-16/16P, PC10E, FL/ET-T-V2H, PC10B,PC10B-P, Nano CPU, PC10P, and PC10GE receive an invalid frame, the outside area of a receive buffer for FL-net are overwritten. As a result, the PLC CPU detects a system error, and the affected products stop.

CWE-119Buffer OverflowCWE-787Out-of-bounds Write

How to fix

Remediation Available
2port-efr firmwareNVD
Affected:< 1.50Fixed in:1.50CVE-2021-27477derived from NVD
fl\/et-t-v2h firmwareNVD
Affected:< f2.8_e1.5Fixed in:f2.8_e1.5CVE-2021-27477derived from NVD
nano 10gx firmwareNVD
Affected:< 3.00Fixed in:3.00CVE-2021-27477derived from NVD
nano 2et firmwareNVD
Affected:< 2.40Fixed in:2.40CVE-2021-27477derived from NVD
nano cpu firmwareNVD
Affected:< 2.08Fixed in:2.08CVE-2021-27477derived from NVD
pc10b-p firmwareNVD
Affected:< 1.11Fixed in:1.11CVE-2021-27477derived from NVD
pc10b firmwareNVD
Affected:< 1.11Fixed in:1.11CVE-2021-27477derived from NVD
pc10e firmwareNVD
Affected:< 1.02Fixed in:1.02CVE-2021-27477derived from NVD
pc10g-cpu firmwareNVD
Affected:< 3.91Fixed in:3.91CVE-2021-27477derived from NVD
pc10ge firmwareNVD
Affected:< 1.04Fixed in:1.04CVE-2021-27477derived from NVD
pc10p-dp-io firmwareNVD
Affected:< 1.50Fixed in:1.50CVE-2021-27477derived from NVD
pc10p-dp firmwareNVD
Affected:< 1.50Fixed in:1.50CVE-2021-27477derived from NVD
pc10p firmwareNVD
Affected:< 1.05Fixed in:1.05CVE-2021-27477derived from NVD
pc10pe-16\/16p firmwareNVD
Affected:< 1.02Fixed in:1.02CVE-2021-27477derived from NVD
pc10pe firmwareNVD
Affected:< 1.02Fixed in:1.02CVE-2021-27477derived from NVD
plus 2p-efr firmwareNVD
Affected:< 3.11Fixed in:3.11CVE-2021-27477derived from NVD
plus bus-ex firmwareNVD
Affected:< 2.13Fixed in:2.13CVE-2021-27477derived from NVD
plus cpu firmwareNVD
Affected:< 3.11Fixed in:3.11CVE-2021-27477derived from NVD
plus efr2 firmwareNVD
Affected:< 3.11Fixed in:3.11CVE-2021-27477derived from NVD
plus efr firmwareNVD
Affected:< 3.11Fixed in:3.11CVE-2021-27477derived from NVD
plus ex2 firmwareNVD
Affected:< 3.11Fixed in:3.11CVE-2021-27477derived from NVD
plus ex firmwareNVD
Affected:< 3.11Fixed in:3.11CVE-2021-27477derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

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

Exploit Intelligence

1.13%probability of exploitation in 30 days
62ndpercentile

Moderate risk: more likely to be exploited than 62% of all known CVEs.

References

Third-Party Advisory1

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2023-4966Critical9.4100%KEV + RansomFix
CVE-2017-11882High7.8100%KEV + Ransom-
CVE-2020-0796Critical10.0100%KEV + Ransom-
CVE-2008-4250Critical9.899%KEV-
CVE-2017-15944Critical9.898%KEVFix
CVE-2015-0014High10.097%--
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.