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Fencer Vulns
high 7.8

CVE-2021-22677 json

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-ser…

published 2021-05-07 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-9813

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits
0
none known

Summary

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).

Patch / fix

  • ti simplelink_cc13x0_software_development_kit 4.10.03
  • ti simplelink_cc13x2_software_development_kit 4.40.00
  • ti simplelink_cc26xx_software_development_kit 4.40.00

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-21-119-01 updated cvss 8.4

Texas Instruments SimpleLink

  • Texas Instruments CC3100 SDK <= 1.3.0 Texas Instruments CC3200 SDK <= 1.5.0 Texas Instruments SimpleLink CC13X0 SDK < 4.10.03 Texas Instruments SimpleLink CC13X2 SDK < 4.40.00 Texas Instruments SimpleLink CC26XX SDK < 4.40.00 Texas Instruments SimpleLink CC32XX SDK <= 4.30.00.06
    +1 more products
    Texas Instruments SimpleLink MSP432E4 SDK <= 4.20.00.12
    affected: mitigation “Texas Instruments recommends users upgrade to the latest software version.”

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • n/a SimpleLink Wi-Fi, MSP432, CC13XX, CC26XX, CC32XX, CC3100

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.