cbcvebase.
CVE-2025-6627
published 2025-06-25

CVE-2025-6627: A vulnerability has been found in TOTOLINK A702R 4.0.0-B20230721.1521 and classified as critical. This vulnerability affects unknown code of the file…

PriorityP266high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
3.36%
87.4th percentile
A vulnerability has been found in TOTOLINK A702R 4.0.0-B20230721.1521 and classified as critical. This vulnerability affects unknown code of the file /boafrm/formIpv6Setup of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Affected

2 ranges
VendorProductVersion rangeFixed in
totolinka702r——
totolinka702r_firmware——

Detection & IOCsextracted from sources · hover to see the quote

path/boafrm/formIpv6Setup↗
path/boafrm/formIPv6Addr↗
commandsubmit-url=↗
snort
alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Totolink X15 formIPv6Addr submit-url Parameter Buffer Overflow Attempt (CVE-2025-6627)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:20; content:"/boafrm/formIPv6Addr"; fast_pattern; http.request_body; content:"submit-url|3d|"; pcre:"/^[^\x26$]{100,}(?:\x26|$)/"; reference:url,github.com/d2pq/cve/blob/main/616/19.md; reference:cve,2025-6627; classtype:web-application-attack; sid:2063335; rev:1; metadata:affected_product TOTOLINK, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_07_08, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2025_07_08, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)
  • →Trigger on HTTP POST requests to /boafrm/formIPv6Addr (or /boafrm/formIpv6Setup) where the request body contains a 'submit-url=' parameter value exceeding 100 characters before an '&' delimiter or end-of-body — indicative of a buffer overflow attempt.
  • →The URI path for this attack is exactly 20 bytes long; enforce a strict URI buffer size check of 20 to reduce false positives.
  • →Attack is initiated remotely via plain HTTP (not TLS); deploy detection at the network perimeter and internally.
  • →The exploit proof-of-concept has been publicly disclosed; treat any matching traffic as high-confidence exploitation attempt (MITRE T1190 — Exploit Public-Facing Application).
  • ·The NVD advisory references the vulnerable endpoint as /boafrm/formIpv6Setup, while the Snort/ET rule targets /boafrm/formIPv6Addr — both paths should be monitored as the rule may cover a related but distinct endpoint on the same device family. ↗
  • ·The ET rule message references 'Totolink X15' but the CVE is assigned to TOTOLINK A702R 4.0.0-B20230721.1521; the rule metadata lists 'affected_product TOTOLINK' generically, so the rule may apply across multiple TOTOLINK device models.

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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