CVE-2021-22671
No exploitation reported by the sources we read.
- Published2021-05-07
- WeaknessCWE-190
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Multiple integer overflow issues exist while processing long domain names, 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).
Timeline
dates in UTC- 2021-05-0714:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-22671?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-22671?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.3 | ≤ 1.3.0 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.5 | ≤ 1.5.0 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.10 | < 4.10.03 | 4.10.03 | NVD |
4 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
Texas Instruments SimpleLink
SimpleLink CC13X0 SDK: versions prior to v4.10.03 · SimpleLink CC26XX SDK: versions prior to v4.40.00 · CC3100 SDK: v1.3.0 and prior · +4 more
Fix
- Mitigation from the vendor CISA ICSA-21-119-01 · 7 productsTexas Instruments recommends users upgrade to the latest software version.
- Mitigation from the vendor CISA ICSA-21-119-01 · 7 productsexas Instruments also recommends users only connect to trusted Wi-Fi networks.
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.19.8read 2026-10-23
- NVDCVSS 2.07.5read 2026-10-23
- CNAweakness (CWE)CWE-190read 2026-10-23
- FIRST EPSSEPSS score1.8 %2026-10-22
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2021-05-07
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-22671?
Is CVE-2021-22671 actively exploited?
What is the CVSS score for CVE-2021-22671?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.