How severe is CVE-2026-1623?

CVE-2026-1623 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-1623 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-1623?

CVE-2026-1623 affects Totolink A7000r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-1623?

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

Does CVE-2026-1623 have an EU (EUVD) identifier?

Yes. CVE-2026-1623 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4962.

When was CVE-2026-1623 published?

CVE-2026-1623 was published on 2026-01-29 and last updated on 2026-06-17.

CVE-2026-1623

CVE-2026-1623 is a medium-severity vulnerability in Totolink A7000r Firmware with a CVSS 3.x base score of 6.3. 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-74.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 6.5
CVSS v4: 2.1
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4962
Weakness: CWE-74
Affected product: Totolink A7000r Firmware
Published: 2026-01-29
Last modified: 2026-06-17

Description

A weakness has been identified in Totolink A7000R 4.1cu.4154. Impacted is the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument FileName causes command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

Frequently asked questions

What is CVE-2026-1623?: A weakness has been identified in Totolink A7000R 4.1cu.4154. Impacted is the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument FileName causes command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.
How severe is CVE-2026-1623?: CVE-2026-1623 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-1623 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-1623?: CVE-2026-1623 affects Totolink A7000r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-1623?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-1623 have an EU (EUVD) identifier?: Yes. CVE-2026-1623 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4962.
When was CVE-2026-1623 published?: CVE-2026-1623 was published on 2026-01-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:a7000r_firmware:4.1cu.4154:*:*:*:*:*:*:*

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