How severe is CVE-2026-1156?

CVE-2026-1156 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-2026-1156 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-1156?

CVE-2026-1156 affects Totolink Lr350 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-1156?

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-2026-1156 have an EU (EUVD) identifier?

Yes. CVE-2026-1156 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3222.

When was CVE-2026-1156 published?

CVE-2026-1156 was published on 2026-01-19 and last updated on 2026-06-17.

CVE-2026-1156

CVE-2026-1156 is a high-severity vulnerability in Totolink Lr350 Firmware 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-119.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
CVSS v4: 7.4
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3222
Weakness: CWE-119
Affected product: Totolink Lr350 Firmware
Published: 2026-01-19
Last modified: 2026-06-17

Description

A vulnerability was determined in Totolink LR350 9.3.5u.6369_B20220309. Affected by this issue is the function setWiFiBasicCfg of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument ssid causes buffer overflow. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized.

Frequently asked questions

What is CVE-2026-1156?: A vulnerability was determined in Totolink LR350 9.3.5u.6369_B20220309. Affected by this issue is the function setWiFiBasicCfg of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument ssid causes buffer overflow. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized.
How severe is CVE-2026-1156?: CVE-2026-1156 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-2026-1156 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-1156?: CVE-2026-1156 affects Totolink Lr350 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-1156?: 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-2026-1156 have an EU (EUVD) identifier?: Yes. CVE-2026-1156 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3222.
When was CVE-2026-1156 published?: CVE-2026-1156 was published on 2026-01-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:totolink:lr350_firmware:9.3.5u.6369_b20220309:*:*:*:*:*:*:*

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