How severe is CVE-2021-22677?

CVE-2021-22677 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-22677 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22677?

CVE-2021-22677 primarily affects Ti Cc3100 Software Development Kit. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-22677?

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-2021-22677 published?

CVE-2021-22677 was published on 2021-05-07 and last updated on 2026-06-17.

CVE-2021-22677

CVE-2021-22677 is a high-severity vulnerability in Ti Cc3100 Software Development Kit with a CVSS 3.x base score of 7.8. 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-190.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.6
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-190
Affected product: Ti Cc3100 Software Development Kit
Published: 2021-05-07
Last modified: 2026-06-17

Description

An integer overflow exists in the APIs of the host MCU while trying to connect to a WIFI network may lead to issues such as a denial-of-service condition or code execution on the SimpleLink Wi-Fi (MSP432E4 SDK: v4.20.00.12 and prior, CC32XX SDK v4.30.00.06 and prior, CC13X0 SDK versions prior to v4.10.03, CC13X2 and CC26XX SDK versions prior to v4.40.00, CC3200 SDK v1.5.0 and prior, CC3100 SDK v1.3.0 and prior).

Frequently asked questions

What is CVE-2021-22677?: An integer overflow exists in the APIs of the host MCU while trying to connect to a WIFI network may lead to issues such as a denial-of-service condition or code execution on the SimpleLink Wi-Fi (MSP432E4 SDK: v4.20.00.12 and prior, CC32XX SDK v4.30.00.06 and prior, CC13X0 SDK versions prior to v4.10.03, CC13X2 and CC26XX SDK versions prior to v4.40.00, CC3200 SDK v1.5.0 and prior, CC3100 SDK v1.3.0 and prior).
How severe is CVE-2021-22677?: CVE-2021-22677 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-22677 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22677?: CVE-2021-22677 primarily affects Ti Cc3100 Software Development Kit. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-22677?: 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-2021-22677 published?: CVE-2021-22677 was published on 2021-05-07 and last updated on 2026-06-17.

References

https://us-cert.cisa.gov/ics/advisories/icsa-21-119-01

Affected products (7)

cpe:2.3:a:ti:cc3100_software_development_kit:*:*:*:*:*:*:*:*
cpe:2.3:a:ti:cc3200_software_development_kit:*:*:*:*:*:*:*:*
cpe:2.3:a:ti:simplelink_cc13x0_software_development_kit:*:*:*:*:*:*:*:*
cpe:2.3:a:ti:simplelink_cc13x2_software_development_kit:*:*:*:*:*:*:*:*
cpe:2.3:a:ti:simplelink_cc26xx_software_development_kit:*:*:*:*:*:*:*:*
cpe:2.3:a:ti:simplelink_cc32xx_software_development_kit:*:*:*:*:*:*:*:*
cpe:2.3:a:ti:simplelink_msp432e4_software_development_kit:*:*:*:*:*:*:*:*

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