cbcvebase.
CVE-2025-5739
published 2025-06-06

CVE-2025-5739: A vulnerability classified as critical has been found in TOTOLINK X15 1.0.0-B20230714.1105. This affects an unknown part of the file /boafrm/formSaveConfig of…

PriorityP269high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
4.43%
90.3th percentile
A vulnerability classified as critical has been found in TOTOLINK X15 1.0.0-B20230714.1105. This affects an unknown part of the file /boafrm/formSaveConfig of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Affected

2 ranges
VendorProductVersion rangeFixed in
totolinkx15——
totolinkx15_firmware——

Detection & IOCsextracted from sources · hover to see the quote

path/boafrm/formSaveConfig↗
snort
alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Totolink formSaveConfig submit-url Parameter Buffer Overflow Attempt (CVE-2025-5739)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:22; content:"/boafrm/formSaveConfig"; fast_pattern; http.request_body; content:"submit-url|3d|"; pcre:"/^[^\x26]{100,}(?:\x26|$)/R"; reference:url,github.com/byxs0x0/cve2/blob/main/9.md; reference:cve,2025-5739; classtype:web-application-attack; sid:2062861; rev:1; metadata:affected_product TOTOLINK, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_06_10, cve CVE_2025_5739, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, tag AI_Generated_Description, updated_at 2025_06_10, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)
  • →Exploit is delivered via HTTP POST to the exact URI /boafrm/formSaveConfig (URI length is exactly 22 bytes); match on POST method and this URI path.
  • →The vulnerable parameter is 'submit-url' (URL-encoded as 'submit-url='); look for this parameter in the POST request body.
  • →The buffer overflow is triggered by supplying 100 or more consecutive non-ampersand characters in the submit-url parameter value; the PCRE pattern /^[^\x26]{100,}(?:\x26|$)/R matches this condition.
  • →The attack targets networking equipment (TOTOLINK X15) and is expected only over plaintext HTTP (not TLS); deploy detection at the network perimeter and internally.
  • →MITRE mapping: Initial Access (TA0001) via Exploit Public-Facing Application (T1190); prioritize detection on internet-exposed TOTOLINK X15 devices.
  • ·The affected firmware version is TOTOLINK X15 1.0.0-B20230714.1105; scope detection to this specific version/model to reduce false positives.
  • ·The Snort/Suricata rule (sid:2062861) is marked as AI_Generated_Description; validate rule behaviour in your environment before production deployment.
  • ·The exploit has been publicly disclosed; treat all TOTOLINK X15 devices running the affected firmware as immediately at risk.

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv4.07.4HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvdv2.09.0CRITICALAV:N/AC:L/Au:S/C:C/I:C/A:C
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