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Public proof of concept

CVE-2025-5909

A public proof of concept exists; no exploitation attested.

  • Published2025-06-10
  • WeaknessCWE-119 · CWE-120

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A vulnerability, which was classified as critical, was found in TOTOLINK EX1200T up to 4.1.2cu.5232_B20210713. Affected is an unknown function of the file /boafrm/formReflashClientTbl of the component HTTP POST Request Handler. The manipulation leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

Timeline

dates in UTC
  1. 2025-06-1002:15CVE publishedNVD

Versions per branch

NVD
Totolink ex1200t firmwareversion to verify
BranchAffectedFixed in
4.1≤ 4.1.2cu.5232_b20210713no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As VulDB, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • TOTOLINK EX1200T
    Affected
    • = 4.1.2cu.5232_B20210713no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2025-06-10

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CISA-ADPSSVC decisionpoc2025-06-10
  • CNACVSS 4.07.4known since 2026-10-23
  • CNACVSS 3.18.8known since 2026-10-23
  • CNACVSS 2.09known since 2026-10-23
  • CNAweakness (CWE)CWE-119, CWE-120known since 2026-10-23
  • NVDweakness (CWE)CWE-120read 2026-10-23
  • FIRST EPSSEPSS score1.5 %2026-11-08
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 4.0 vector
CVSS: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
Published
2025-06-10
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-64c7-4r62-687q

Frequently asked questions

What is CVE-2025-5909?

A vulnerability, which was classified as critical, was found in TOTOLINK EX1200T up to 4.1.2cu.5232_B20210713. Affected is an unknown function of the file /boafrm/formReflashClientTbl of the component HTTP POST Request Handler. The manipulation leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

Is CVE-2025-5909 actively exploited?

A proof-of-concept exploit exists for CVE-2025-5909, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2025-5909?

CVE-2025-5909 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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