CVE-2026-121616
Linksys E5600 JSON Request mesh_login.cgi strcpy out-of-bounds write
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
A vulnerability was identified in Linksys E5600 1.1.0.26. Affected by this vulnerability is the function strcpy of the file /cgi-bin/mesh_login.cgi of the component JSON Request Parser. The manipulation of the argument username/password/token/source/cn/action leads to out-of-bounds write. The attack may be initiated remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way. This vulnerability only affects products that are no longer supported by the maintainer.
| CWE | CWE-787 CWE-119 |
| Vendor | linksys |
| Product | e5600 |
| Published | Nov 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linksys / E5600
1.1.0.26
References
vuldb.com: https://vuldb.com/vuln/430464 vuldb.com: https://vuldb.com/vuln/430464/cti vuldb.com: https://vuldb.com/cve/CVE-2026-121616 vuldb.com: https://vuldb.com/submit/1023312 github.com: https://github.com/Zimo-666/E5600-cves/tree/main/03-mesh-login-global-overflow linksys.com: https://www.linksys.com/
Credits
🔍 liuyingqi (VulDB User) VulDB CNA Team