How severe is CVE-2026-5679?

CVE-2026-5679 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-5679 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-5679?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-5679 have an EU (EUVD) identifier?

Yes. CVE-2026-5679 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19464.

When was CVE-2026-5679 published?

CVE-2026-5679 was published on 2026-04-06 and last updated on 2026-06-17.

CVE-2026-5679

CVE-2026-5679 is a medium-severity vulnerability with a CVSS 3.x base score of 5.5. 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: Medium (CVSS 3.x base score 5.5)
CVSS v2: 5.2
CVSS v4: 2.0
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19464
Weakness: CWE-77
Published: 2026-04-06
Last modified: 2026-06-17

Description

A security vulnerability has been detected in Totolink A3300R 17.0.0cu.557_B20221024. The impacted element is the function vsetTr069Cfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument stun_pass leads to os command injection. The exploit has been disclosed publicly and may be used.

Frequently asked questions

What is CVE-2026-5679?: A security vulnerability has been detected in Totolink A3300R 17.0.0cu.557_B20221024. The impacted element is the function vsetTr069Cfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument stun_pass leads to os command injection. The exploit has been disclosed publicly and may be used.
How severe is CVE-2026-5679?: CVE-2026-5679 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-5679 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-5679?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-5679 have an EU (EUVD) identifier?: Yes. CVE-2026-5679 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19464.
When was CVE-2026-5679 published?: CVE-2026-5679 was published on 2026-04-06 and last updated on 2026-06-17.

References

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