CVE-2026-1637A vulnerability was identified in Tenda AC21 16.03.08.16.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function fromAdvSetMacMtuWan of the file /goform/AdvSetMacMtuWan. The manipulation leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used.
- CVSS
- 8.8 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-119, CWE-121
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
tenda ac21_firmware tenda:ac21_firmware | 16.03.08.16 | NVD |
References
- https://github.com/LX-LX88/cve/issues/25broken-link
- https://vuldb.com/?ctiid.343416permissions-required, vdb-entry
- https://vuldb.com/?id.343416third-party-advisory, vdb-entry
- https://vuldb.com/?submit.740865third-party-advisory, vdb-entry
- https://www.tenda.com.cn/product
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.