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CVE-2025-3803
published 2025-04-19

CVE-2025-3803: A vulnerability was found in Tenda W12 and i24 3.0.0.4(2887)/3.0.0.5(3644). It has been rated as critical. This issue affects the function…

PriorityP265high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
EPSS
0.84%
53.7th percentile
A vulnerability was found in Tenda W12 and i24 3.0.0.4(2887)/3.0.0.5(3644). It has been rated as critical. This issue affects the function cgiSysScheduleRebootSet of the file /bin/httpd. The manipulation of the argument rebootDate leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Affected

8 ranges
VendorProductVersion rangeFixed in
tendai24——
tendai24——
tendai24_firmware——
tendai24_firmware——
tendaw12——
tendaw12——
tendaw12_firmware——
tendaw12_firmware——

Detection & IOCsextracted from sources · hover to see the quote

path/goform/modules
path/bin/httpd
snort
alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS Tenda sysScheduleRebootSet rebootDate parameter Buffer Overflow Attempt (CVE-2025-3803)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:15; content:"/goform/modules"; http.request_body; content:"sysScheduleRebootSet"; fast_pattern; content:"rebootDate"; pcre:"/^\x22\x3a[^\x2c\x7d$]{100,}(?:\x2c|\x7d|$)/R"; reference:cve,2025-3803; reference:url,github.com/02Tn/vul/issues; classtype:web-application-attack; sid:2062206; rev:2; metadata:affected_product Tenda, attack_target Networking_Equipment, tls_state plaintext, created_at 2025_05_08, cve CVE_2025_3803, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2025_05_09, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)
  • →Exploit traffic uses HTTP POST method targeting the URI /goform/modules (exact 15-byte URI length enforced by bsize:15).
  • →Request body must contain both 'sysScheduleRebootSet' and 'rebootDate' keywords to identify the vulnerable function invocation.
  • →The overflow payload is detected by a PCRE match on the rebootDate value: a JSON-style string value (opening quote + colon) followed by 100 or more characters that are not a comma or closing brace, indicating an oversized input.
  • →Attack is plaintext HTTP (not TLS), suitable for perimeter and internal network detection points.
  • →The vulnerability is a stack-based buffer overflow in the cgiSysScheduleRebootSet function within /bin/httpd, exploitable remotely without authentication.
  • ·Affected versions are Tenda W12 and i24 firmware 3.0.0.4(2887) and 3.0.0.5(3644). Ensure detection scope covers both device models and both firmware versions.
  • ·The Snort/Suricata rule (sid:2062206, rev:2) was created 2025-05-08 and updated 2025-05-09; ensure your ruleset is at rev:2 or later.
  • ·The exploit has been publicly disclosed; treat this as actively exploitable in the wild.

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv4.08.7HIGHCVSS: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:X/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
osv5.5MEDIUM
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