How severe is CVE-2021-22673?

CVE-2021-22673 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-22673 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22673?

CVE-2021-22673 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-2021-22673?

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-2021-22673 published?

CVE-2021-22673 was published on 2021-05-07 and last updated on 2026-06-17.

CVE-2021-22673

CVE-2021-22673 is a high-severity vulnerability in Ti Cc3100 Software Development Kit with a CVSS 3.x base score of 8.0. 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-787.

Key facts

Severity: High (CVSS 3.x base score 8.0)
CVSS v2: 6.0
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Ti Cc3100 Software Development Kit
Published: 2021-05-07
Last modified: 2026-06-17

Description

The affected product is vulnerable to stack-based buffer overflow while processing over-the-air firmware updates from the CDN server, which may allow an attacker to remotely execute code 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-2021-22673?: The affected product is vulnerable to stack-based buffer overflow while processing over-the-air firmware updates from the CDN server, which may allow an attacker to remotely execute code 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-2021-22673?: CVE-2021-22673 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-22673 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22673?: CVE-2021-22673 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-2021-22673?: 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-2021-22673 published?: CVE-2021-22673 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:*:*:*:*:*:*:*:*

More vulnerabilities in Ti Cc3100 Software Development Kit

CVE-2021-22671 — Critical (CVSS 9.8): Multiple integer overflow issues exist while processing long domain names, which may allow an attacker to remotely…
CVE-2021-22679 — Critical (CVSS 9.8): The affected product is vulnerable to an integer overflow while processing HTTP headers, which may allow an attacker to…
CVE-2021-22677 — High (CVSS 7.8): An integer overflow exists in the APIs of the host MCU while trying to connect to a WIFI network may lead to issues…
CVE-2021-22675 — High (CVSS 7.2): The affected product is vulnerable to integer overflow while parsing malformed over-the-air firmware update files,…

All CVEs affecting Ti Cc3100 Software Development Kit →

Other CWE-787 (Out-of-bounds Write) vulnerabilities

CVE-2026-42369 — Critical (CVSS 10.0): GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other…
CVE-2026-4746 — Critical (CVSS 10.0): Out-of-bounds Write vulnerability in timeplus-io proton (base/poco/Foundation/src‎ modules). This vulnerability is…
CVE-2025-43300 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS…
CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
CVE-2024-42479 — Critical (CVSS 10.0): llama.cpp provides LLM inference in C/C++. The unsafe `data` pointer member in the `rpc_tensor` structure can cause…
CVE-2024-39791 — Critical (CVSS 10.0): Stack-based buffer overflow vulnerabilities affecting Vonets industrial wifi bridge relays and wifi bridge…

Browse all CWE-787 (Out-of-bounds Write) vulnerabilities →