How severe is CVE-2021-21966?

CVE-2021-21966 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-21966 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21966?

CVE-2021-21966 primarily affects Ti Simplelink Cc32xx Software Development Kit. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-21966?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-21966 published?

CVE-2021-21966 was published on 2022-02-16 and last updated on 2026-06-17.

CVE-2021-21966

CVE-2021-21966 is a medium-severity vulnerability in Ti Simplelink Cc32xx Software Development Kit with a CVSS 3.x base score of 5.3. 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-908.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-908
Affected product: Ti Simplelink Cc32xx Software Development Kit
Published: 2022-02-16
Last modified: 2026-06-17

Description

An information disclosure vulnerability exists in the HTTP Server /ping.html functionality of Texas Instruments CC3200 SimpleLink Solution NWP 2.9.0.0. A specially-crafted HTTP request can lead to an uninitialized read. An attacker can send an HTTP request to trigger this vulnerability.

Frequently asked questions

What is CVE-2021-21966?: An information disclosure vulnerability exists in the HTTP Server /ping.html functionality of Texas Instruments CC3200 SimpleLink Solution NWP 2.9.0.0. A specially-crafted HTTP request can lead to an uninitialized read. An attacker can send an HTTP request to trigger this vulnerability.
How severe is CVE-2021-21966?: CVE-2021-21966 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-21966 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21966?: CVE-2021-21966 primarily affects Ti Simplelink Cc32xx Software Development Kit. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-21966?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-21966 published?: CVE-2021-21966 was published on 2022-02-16 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:ti:simplelink_cc32xx_software_development_kit:*:*:*:*:*:*:*:*
cpe:2.3:o:ti:cc3100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ti:cc3200_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Ti Simplelink Cc32xx 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-2021-22673 — High (CVSS 8.0): The affected product is vulnerable to stack-based buffer overflow while processing over-the-air firmware updates from…
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-2021-27504 — High (CVSS 7.4): Texas Instruments devices running FREERTOS, malloc returns a valid pointer to a small buffer on extremely large…
CVE-2021-27502 — High (CVSS 7.4): Texas Instruments TI-RTOS, when configured to use HeapMem heap(default), malloc returns a valid pointer to a small…

All CVEs affecting Ti Simplelink Cc32xx Software Development Kit →

Other CWE-908 (Use of Uninitialized Resource) vulnerabilities

CVE-2025-1942 — Critical (CVSS 9.8): When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated…
CVE-2024-47540 — Critical (CVSS 9.8): GStreamer is a library for constructing graphs of media-handling components. An uninitialized stack variable…
CVE-2024-32611 — Critical (CVSS 9.8): HDF5 Library through 1.14.3 may use an uninitialized value in H5A__attr_release_table in H5Aint.c.
CVE-2023-24941 — Critical (CVSS 9.8): Windows Network File System Remote Code Execution Vulnerability
CVE-2022-26437 — Critical (CVSS 9.8): In httpclient, there is a possible out of bounds write due to uninitialized data. This could lead to remote escalation…
CVE-2021-45703 — Critical (CVSS 9.8): An issue was discovered in the tectonic_xdv crate before 0.1.12 for Rust. XdvParser::<T>::process may read from…

Browse all CWE-908 (Use of Uninitialized Resource) vulnerabilities →