CVE-2026-1547
published 2026-01-28CVE-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…
PriorityP184critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
ITWVulnCheck KEV
Exploited in the wild
EPSS
3.05%
87.1th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| totolink | a7000r | — | — |
| totolink | a7000r_firmware | — | — |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv4.02.1LOWCVSS: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
nvdv2.06.5MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P
vulncheck9.8CRITICAL
CVEs like this are exactly what “Exploited This Week” covers.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
GHSA
GHSA-26qr-hrpr-gcj8: A vulnerability was detected in Totolink A7000R 4
ghsa_unreviewed·2026-01-29
CVE-2026-1547 [MEDIUM] CWE-74 GHSA-26qr-hrpr-gcj8: A vulnerability was detected in Totolink A7000R 4
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.
VulnCheck
TOTOLINK a7000r_firmware Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
vulncheck·2026·CVSS 9.8
CVE-2026-1547 [CRITICAL] TOTOLINK a7000r_firmware Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
TOTOLINK a7000r_firmware Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
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.
Affected: TOTOLINK a7000r_firmware
Required Action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Exploitation References: https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2026-09-01&host_type=src&vulnerability=cve-2026-1547; https://previdian.com/
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/01_RCE_setUnloadUserData_RCE.mdhttps://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/01_RCE_setUnloadUserData_RCE.md#pochttps://vuldb.com/?ctiid.343231https://vuldb.com/?id.343231https://vuldb.com/?submit.739713https://www.totolink.net/https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/01_RCE_setUnloadUserData_RCE.mdhttps://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/01_RCE_setUnloadUserData_RCE.md#poc
2026-01-28
Published
Exploited in the wild