CVE-2021-22671Network attack vector

Remote code execution via domain-name integer overflows

Published May 7, 2021 · Updated Aug 3, 2024

Integer overflows in Texas Instruments SimpleLink Wi-Fi SDKs allow remote attackers to execute code through long domain names. The domain-name processing path performs integer arithmetic that wraps on oversized names, causing memory corruption. Unauthenticated network reachability is sufficient; affected releases include MSP432E4 SDK 4.20.00.12 and earlier, CC32XX SDK 4.30.00.06 and earlier, CC13X0 SDK before 4.10.03, CC13X2 and CC26XX SDKs before 4.40.00, CC3200 SDK 1.5.0 and earlier, and CC3100 SDK 1.3.0 and earlier.

CVSS severity9.8
Critical
EPSS probability1.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflows in Texas Instruments SimpleLink Wi-Fi SDKs allow remote attackers to execute code through long domain names. The domain-name processing path performs integer arithmetic that wraps on oversized names, causing memory corruption. Unauthenticated network reachability is sufficient; affected releases include MSP432E4 SDK 4.20.00.12 and earlier, CC32XX SDK 4.30.00.06 and earlier, CC13X0 SDK before 4.10.03, CC13X2 and CC26XX SDKs before 4.40.00, CC3200 SDK 1.5.0 and earlier, and CC3100 SDK 1.3.0 and earlier.

The record

CVE
CVE-2021-22671
Published
May 7, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 7, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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