High severity · published Feb 21, 2026
CVE-2026-2876
Tenda A18 setBlackRule parse_macfilter_rule stack-based overflow
8.8
CVSS
0.6%
EPSS
No
On KEV
Description
A vulnerability was determined in Tenda A18 15.13.07.13. This affects the function parse_macfilter_rule of the file /goform/setBlackRule. This manipulation of the argument deviceList causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
A1
A18 · Tenda
15.13.07.13 · source: vendor
AF
A18 Firmware · Tenda
15.13.07.13 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-2876
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-2876
Issue Tracking
https://github.com/master-abc/cve/issues/38
Permissions Required
https://vuldb.com/?ctiid.347114
Third Party Advisory
https://vuldb.com/?id.347114
Third Party Advisory
https://vuldb.com/?submit.754675
Product
https://www.tenda.com.cn/
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