CVE-2026-5854
CVE-2026-5854 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 18% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-77.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 10.0
- CVSS v4: 8.9
- EPSS exploit prediction: 18% (97th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-20870
- Weakness: CWE-77
- Published:
- Last modified:
Description
A vulnerability was detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this issue is the function setWiFiEasyCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument merge results in os command injection. It is possible to initiate the attack remotely. The exploit is now public and may be used.
Frequently asked questions
- What is CVE-2026-5854?
- A vulnerability was detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this issue is the function setWiFiEasyCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument merge results in os command injection. It is possible to initiate the attack remotely. The exploit is now public and may be used.
- How severe is CVE-2026-5854?
- CVE-2026-5854 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-5854 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-5854?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-5854 have an EU (EUVD) identifier?
- Yes. CVE-2026-5854 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20870.
- When was CVE-2026-5854 published?
- CVE-2026-5854 was published on 2026-04-09 and last updated on 2026-06-17.
References
- https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_160/README.md
- https://vuldb.com/submit/791276
- https://vuldb.com/vuln/356380
- https://vuldb.com/vuln/356380/cti
- https://www.totolink.net/
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