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The vulnerability of the fromAdvSetMacMtuWan function in the Tenda AC21 router software allows a hacker to execute arbitrary code.
🗓️ 02 Feb 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec🔗 bdu.fstec.ru👁 1 Views
| Reporter | Title | Published | Views | Family All 10 |
|---|---|---|---|---|
 | CVE-2026-1637 | 29 Jan 202622:32 | – | attackerkb |
 | CVE-2026-1637 | 29 Jan 202619:41 | – | circl |
 | Tenda AC21 security vulnerabilities | 29 Jan 202600:00 | – | cnnvd |
 | CVE-2026-1637 | 29 Jan 202622:32 | – | cve |
 | CVE-2026-1637 Tenda AC21 AdvSetMacMtuWan fromAdvSetMacMtuWan stack-based overflow | 29 Jan 202622:32 | – | cvelist |
 | CVE-2026-1637 | 29 Jan 202623:16 | – | nvd |
 | CVE-2026-1637 | 29 Jan 202623:16 | – | osv |
 | PT-2026-5370 | 29 Jan 202600:00 | – | ptsecurity |
 | CVE-2026-1637 | 31 Jan 202603:19 | – | redhatcve |
 | CVE-2026-1637 Tenda AC21 AdvSetMacMtuWan fromAdvSetMacMtuWan stack-based overflow | 29 Jan 202622:32 | – | vulnrichment |
10
Node
| Source | Link |
|---|---|
| vuldb | www.vuldb.com/ |
| web | www.web.nvd.nist.gov/view/vuln/detail |
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02 Feb 2026 00:00Current
8High risk
Vulners AI Score8
CVSS 38.8
CVSS 29
EPSS0.00645