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Vulnerability record · CVE-2025-60691 · published 13 November 2025

CVE-2025-60691: Linksys e1200 firmware stack-based buffer overflow vulnerability

Linksys · E1200 Firmware

A stack-based buffer overflow exists in the httpd binary of Linksys E1200 v2 routers (Firmware E1200_v2.0.11.001_us.tar.gz). The apply_cgi and block_cgi functions copy user-supplied input from the "url" CGI parameter into stack buffers (v36, v29) using sprintf without bounds checking. Because these buffers are allocated as single-byte variables, any non-empty input will trigger a buffer overflow. Remote attackers can exploit this vulnerability via crafted HTTP requests to execute arbitrary code or cause denial of service without authentication.

8.8 CVSS 3.1 High EPSS 0.71% · top 48.2% CWE-121 · Stack-based buffer overflow
8.8CVSS 3.1 base score
0.71%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 1 tagged exploit
5 Jul 2026Last modified by NVD

Description

A stack-based buffer overflow exists in the httpd binary of Linksys E1200 v2 routers (Firmware E1200_v2.0.11.001_us.tar.gz). The apply_cgi and block_cgi functions copy user-supplied input from the "url" CGI parameter into stack buffers (v36, v29) using sprintf without bounds checking. Because these buffers are allocated as single-byte variables, any non-empty input will trigger a buffer overflow. Remote attackers can exploit this vulnerability via crafted HTTP requests to execute arbitrary code or cause denial of service without authentication.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/yifan20020708/SGTaint-0-day/blob/main/Linksys/Linksys-E1200/CVE-2025-60691.md ExploitThird Party Advisory
https://www.linksys.com/ Product

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2022-38555Linksys e1200 firmware out-of-bounds write vulnerabilityLinksys E1200 v1.0.04 is vulnerable to Buffer Overflow via ej_get_web_page_name.EPSS 9.8%8.8CVE-2025-60690Linksys e1200 firmware stack-based buffer overflow vulnerabilityA stack-based buffer overflow exists in the get_merge_ipaddr function of the httpd binary on Linksys E1200 v2 routers (Firmware E1200_v2.0.11.001_us.…EPSS 3.9%8.4CVE-2025-60692Linksys e1200 firmware stack-based buffer overflow vulnerabilityA stack-based buffer overflow vulnerability exists in the libshared.so library of Cisco Linksys E1200 v2 routers (Firmware E1200_v2.0.11.001_us.tar.g…EPSS 0.23%7.5CVE-2025-60694Linksys e1200 firmware stack-based buffer overflow vulnerabilityA stack-based buffer overflow exists in the validate_static_route function of the httpd binary on Linksys E1200 v2 routers (Firmware E1200_v2.0.11.00…EPSS 1.1%7.2CVE-2018-3953Linksys e1200 firmware os command injection vulnerabilityDevices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04) are susceptible to O…EPSS 14%7.2CVE-2018-3954Linksys e1200 firmware os command injection vulnerabilityDevices in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2500 Firmware Version 3.0.04) are susceptible to O…EPSS 3.4%7.2CVE-2018-3955Linksys e1200 firmware os command injection vulnerabilityAn exploitable operating system command injection exists in the Linksys ESeries line of routers (Linksys E1200 Firmware Version 2.0.09 and Linksys E2…EPSS 4.8%6.5CVE-2025-60693Linksys e1200 firmware stack-based buffer overflow vulnerabilityA stack-based buffer overflow exists in the get_merge_mac function of the httpd binary on Linksys E1200 v2 routers (Firmware E1200_v2.0.11.001_us.tar…EPSS 0.77%

Source: NIST National Vulnerability Database (record CVE-2025-60691), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.