High severity · published Apr 13, 2026
CVE-2026-6158
Totolink N300RH upgrade.so setUpgradeUboot os command injection
7.3
CVSS
1.6%
EPSS
No
On KEV
Description
A flaw has been found in Totolink N300RH 6.1c.1353_B20190305. Affected is the function setUpgradeUboot of the file upgrade.so. This manipulation of the argument FileName causes os command injection. The attack is possible to be carried out remotely. The exploit has been published and may be used.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.6% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N3
N300RH · Totolink
6.1c.1353_B20190305 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-6158
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-6158
github.com
https://github.com/xyh4ck/iot_poc/tree/main/TOTOLINK/N300RHv4/02_setUpgradeUboot_RCE
vuldb.com
https://vuldb.com/submit/796426
vuldb.com
https://vuldb.com/vuln/357038
vuldb.com
https://vuldb.com/vuln/357038/cti
www.totolink.net
https://www.totolink.net/
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