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ExploitedNot in CISA KEV yet

CVE-2026-1547

Exploitation confirmed. First attested on 2026-09-01 by GCVE · previdian, GCVE · shadowserver.

  • Published2026-01-28
  • WeaknessCWE-74 · CWE-77

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 was detected in Totolink A7000R 4.1cu.4154. This affects the function setUnloadUserData of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument plugin_name results in command injection. It is possible to launch the attack remotely. The exploit is now public and may be used.

Timeline

dates in UTC
  1. 2026-01-2822:15CVE publishedNVD
  2. 2026-09-01Listed as exploited by GCVEGCVE
  3. 2026-09-01Exploitation first reportedGCVE

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-1547?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-1547?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Totolink a7000r firmwareversion to verify
BranchAffectedFixed in
4.1= 4.1cu.4154no fix published

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

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 repositories
none listed
PoC-in-GitHub

Sources

  • GCVEexploitation2026-09-01
  • CISA-ADPSSVC decisionpoc2026-01-29
  • OpenCVESSVC decisionpoc—
  • CNACVSS 4.02.1read 2026-10-23
  • CNACVSS 3.16.3read 2026-10-23
  • NVDCVSS 3.19.8read 2026-10-23
  • CNACVSS 2.06.5read 2026-10-23
  • CNAweakness (CWE)CWE-74, CWE-77read 2026-10-23
  • NVDweakness (CWE)CWE-77read 2026-10-23
  • FIRST EPSSEPSS score3.1 %2026-10-22

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/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:L/VI:L/VA:L/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
2026-01-28
Last Modified
2026-06-17
NVD status
Analyzed

Frequently asked questions

What is CVE-2026-1547?

A vulnerability was detected in Totolink A7000R 4.1cu.4154. This affects the function setUnloadUserData of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument plugin_name results in command injection. It is possible to launch the attack remotely. The exploit is now public and may be used.

Is CVE-2026-1547 actively exploited?

A proof-of-concept exploit exists for CVE-2026-1547, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-1547?

CVE-2026-1547 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

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