How severe is CVE-2026-7548?

CVE-2026-7548 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-7548 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-7548?

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-2026-7548 have an EU (EUVD) identifier?

Yes. CVE-2026-7548 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26472.

When was CVE-2026-7548 published?

CVE-2026-7548 was published on 2026-05-01 and last updated on 2026-06-17.

CVE-2026-7548

CVE-2026-7548 is a high-severity vulnerability with a CVSS 3.x base score of 8.8. 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-74.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
CVSS v4: 7.4
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26472
Weakness: CWE-74
Published: 2026-05-01
Last modified: 2026-06-17

Description

A vulnerability was detected in Totolink NR1800X 9.1.0u.6279_B20210910. This affects the function sub_41A68C of the file /cgi-bin/cstecgi.cgi. Performing a manipulation of the argument setUssd results in command injection. The attack is possible to be carried out remotely. The exploit is now public and may be used.

Frequently asked questions

What is CVE-2026-7548?: A vulnerability was detected in Totolink NR1800X 9.1.0u.6279_B20210910. This affects the function sub_41A68C of the file /cgi-bin/cstecgi.cgi. Performing a manipulation of the argument setUssd results in command injection. The attack is possible to be carried out remotely. The exploit is now public and may be used.
How severe is CVE-2026-7548?: CVE-2026-7548 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-7548 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-7548?: 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-2026-7548 have an EU (EUVD) identifier?: Yes. CVE-2026-7548 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26472.
When was CVE-2026-7548 published?: CVE-2026-7548 was published on 2026-05-01 and last updated on 2026-06-17.

References

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