How severe is CVE-2026-2877?

CVE-2026-2877 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-2026-2877 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-2877?

CVE-2026-2877 affects Tenda A18 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2877?

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-2026-2877 have an EU (EUVD) identifier?

Yes. CVE-2026-2877 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7592.

When was CVE-2026-2877 published?

CVE-2026-2877 was published on 2026-02-21 and last updated on 2026-06-17.

CVE-2026-2877

CVE-2026-2877 is a high-severity vulnerability in Tenda A18 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: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7592
Weakness: CWE-119
Affected product: Tenda A18 Firmware
Published: 2026-02-21
Last modified: 2026-06-17

Description

A vulnerability has been found in Tenda A18 15.13.07.13. This affects the function strcpy of the file /goform/WifiExtraSet of the component Httpd Service. The manipulation of the argument wpapsk_crypto5g leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2026-2877?: A vulnerability has been found in Tenda A18 15.13.07.13. This affects the function strcpy of the file /goform/WifiExtraSet of the component Httpd Service. The manipulation of the argument wpapsk_crypto5g leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.
How severe is CVE-2026-2877?: CVE-2026-2877 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-2026-2877 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2877?: CVE-2026-2877 affects Tenda A18 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2877?: 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-2026-2877 have an EU (EUVD) identifier?: Yes. CVE-2026-2877 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7592.
When was CVE-2026-2877 published?: CVE-2026-2877 was published on 2026-02-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:a18_firmware:15.13.07.13:*:*:*:*:*:*:*

More vulnerabilities in Tenda A18 Firmware

CVE-2023-50585 — Critical (CVSS 9.8): Tenda A18 v15.13.07.09 was discovered to contain a stack overflow via the devName parameter in the formSetDeviceName…
CVE-2026-2876 — High (CVSS 8.8): A vulnerability was determined in Tenda A18 15.13.07.13. This affects the function parse_macfilter_rule of the file…
CVE-2024-32305 — High (CVSS 8.8): Tenda A18 v15.03.05.05 firmware has a stack overflow vulnerability located via the PPW parameter in the…
CVE-2023-39829 — High (CVSS 7.5): Tenda A18 V15.13.07.09 was discovered to contain a stack overflow via the wpapsk_crypto2_4g parameter in the…
CVE-2023-39828 — High (CVSS 7.5): Tenda A18 V15.13.07.09 was discovered to contain a stack overflow via the security parameter in the formWifiBasicSet…
CVE-2023-39827 — High (CVSS 7.5): Tenda A18 V15.13.07.09 was discovered to contain a stack overflow via the rule_info parameter in the…

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