High severity · published Apr 13, 2026
CVE-2026-6157
Totolink A800R app.so setAppEasyWizardConfig buffer overflow
8.8
CVSS
0.5%
EPSS
No
On KEV
Description
A vulnerability was detected in Totolink A800R 4.1.2cu.5137_B20200730. This impacts the function setAppEasyWizardConfig in the library /lib/cste_modules/app.so. The manipulation of the argument apcliSsid results in buffer overflow. The attack can be executed remotely. The exploit is now public and may be used.
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)0.5% · higher than 41% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
A8
A800R · Totolink
4.1.2cu.5137_B20200730 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-6157
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-6157
github.com
https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A800R/01_Buffer_Overflow_setAppEasyWizardConfig.md
vuldb.com
https://vuldb.com/submit/793114
vuldb.com
https://vuldb.com/vuln/357037
vuldb.com
https://vuldb.com/vuln/357037/cti
www.totolink.net
https://www.totolink.net/
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