CVE-2026-6158
CVE-2026-6158 is a high-severity vulnerability with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.
Key facts
- Severity: High (CVSS 3.x base score 7.3)
- CVSS v2: 7.5
- CVSS v4: 5.5
- EPSS exploit prediction: 1% (69th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-21851
- Weakness: CWE-77
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-6158?
- 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.
- How severe is CVE-2026-6158?
- CVE-2026-6158 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
- Is CVE-2026-6158 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-6158?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-6158 have an EU (EUVD) identifier?
- Yes. CVE-2026-6158 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21851.
- When was CVE-2026-6158 published?
- CVE-2026-6158 was published on 2026-04-13 and last updated on 2026-06-17.
References
- https://github.com/xyh4ck/iot_poc/tree/main/TOTOLINK/N300RHv4/02_setUpgradeUboot_RCE
- https://vuldb.com/submit/796426
- https://vuldb.com/vuln/357038
- https://vuldb.com/vuln/357038/cti
- https://www.totolink.net/
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