cbcvebase.
CVE-2026-2847
published 2026-02-20

CVE-2026-2847: A vulnerability was detected in UTT HiPER 520 1.7.7-160105. Affected is the function sub_44EFB4 of the file /goform/formReleaseConnect of the component Web…

PriorityP267high7.2CVSS 3.1
AVNACLPRHUINSUCHIHAH
EPSS
9.23%
94.7th percentile
A vulnerability was detected in UTT HiPER 520 1.7.7-160105. Affected is the function sub_44EFB4 of the file /goform/formReleaseConnect of the component Web Management Interface. The manipulation of the argument Isp_Name results in os command injection. The attack can be launched remotely. The exploit is now public and may be used.

Affected

2 ranges
VendorProductVersion rangeFixed in
utt520_firmware——
utthiper_520——

Detection & IOCsextracted from sources · hover to see the quote

path/goform/formReleaseConnect↗
path/goform/formReConnect
snort
alert http any any -> $HOME_NET any (msg:"ET WEB_SPECIFIC_APPS UTT formReConnect Isp_Name Parameter Command Injection Attempt (CVE-2026-2847)"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:21; content:"/goform/formReConnect"; fast_pattern; http.request_body; content:"Isp_Name|3d|"; pcre:"/^[^\x26]*?(?:(?:\x3b|%3[Bb])|(?:\x0a|%0[Aa])|(?:\x60|%60)|(?:\x7c|%7[Cc])|(?:\x24|%24))+/R"; reference:url,github.com/cha0yang1/UTT520CVE/blob/main/UTTRCE2.md; reference:cve,2026-2847; classtype:attempted-admin; sid:2067911; rev:1; metadata:affected_product UTT, attack_target Networking_Equipment, tls_state plaintext, created_at 2026_02_24, cve CVE_2026_2847, deployment Perimeter, deployment Internal, performance_impact Low, confidence High, signature_severity Major, tag Exploit, updated_at 2026_02_24, mitre_tactic_id TA0001, mitre_tactic_name Initial_Access, mitre_technique_id T1190, mitre_technique_name Exploit_Public_Facing_Application; target:dest_ip;)
  • →Attack is delivered via HTTP POST to /goform/formReConnect (or /goform/formReleaseConnect) with the Isp_Name parameter containing OS command injection characters: semicolon (;/%3B), newline (\n/%0A), backtick (`/%60), pipe (|/%7C), or dollar sign ($/%24).
  • →The attack targets the Web Management Interface of UTT HiPER 520 firmware version 1.7.7-160105 and is remotely exploitable without authentication context specified; monitor inbound HTTP POST traffic to the device's management interface. ↗
  • →The Snort/Suricata rule (SID 2067911) matches on plaintext HTTP only (tls_state plaintext); ensure perimeter and internal sensors inspect unencrypted management traffic to UTT networking equipment.
  • ·The NVD advisory references the endpoint as /goform/formReleaseConnect while the Snort rule targets /goform/formReConnect (bsize:21). These may be two distinct endpoints or a discrepancy between sources; detection should cover both paths. ↗
  • ·The Snort rule enforces an exact URI byte-size of 21 (bsize:21) matching /goform/formReConnect exactly; any URL encoding or path variation may evade this specific rule.

CVSS provenance

nvdv3.17.2HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
nvdv4.07.3HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:H/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
nvdv2.08.3HIGHAV:N/AC:L/Au:M/C:C/I:C/A:C
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