How severe is CVE-2026-4497?

CVE-2026-4497 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-2026-4497 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-2026-4497?

CVE-2026-4497 affects Totolink Wa300 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-4497?

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-2026-4497 have an EU (EUVD) identifier?

Yes. CVE-2026-4497 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13770.

When was CVE-2026-4497 published?

CVE-2026-4497 was published on 2026-03-20 and last updated on 2026-06-17.

CVE-2026-4497

CVE-2026-4497 is a high-severity vulnerability in Totolink Wa300 Firmware 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-78.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 7.5
CVSS v4: 5.5
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-13770
Weakness: CWE-78
Affected product: Totolink Wa300 Firmware
Published: 2026-03-20
Last modified: 2026-06-17

Description

A vulnerability was determined in Totolink WA300 5.2cu.7112_B20190227. Affected by this issue is the function recvUpgradeNewFw of the file /cgi-bin/cstecgi.cgi. This manipulation causes os command injection. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized.

Frequently asked questions

What is CVE-2026-4497?: A vulnerability was determined in Totolink WA300 5.2cu.7112_B20190227. Affected by this issue is the function recvUpgradeNewFw of the file /cgi-bin/cstecgi.cgi. This manipulation causes os command injection. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized.
How severe is CVE-2026-4497?: CVE-2026-4497 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-2026-4497 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-2026-4497?: CVE-2026-4497 affects Totolink Wa300 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-4497?: 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-2026-4497 have an EU (EUVD) identifier?: Yes. CVE-2026-4497 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-13770.
When was CVE-2026-4497 published?: CVE-2026-4497 was published on 2026-03-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:wa300_firmware:5.2cu.7112_b20190227:*:*:*:*:*:*:*

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