How severe is CVE-2026-2876?

CVE-2026-2876 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-2026-2876 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-2876?

CVE-2026-2876 affects Tenda A18 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2876?

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-2026-2876 have an EU (EUVD) identifier?

Yes. CVE-2026-2876 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7590.

When was CVE-2026-2876 published?

CVE-2026-2876 was published on 2026-02-21 and last updated on 2026-06-17.

CVE-2026-2876

CVE-2026-2876 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: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7590
Weakness: CWE-119
Affected product: Tenda A18 Firmware
Published: 2026-02-21
Last modified: 2026-06-17

Description

A vulnerability was determined in Tenda A18 15.13.07.13. This affects the function parse_macfilter_rule of the file /goform/setBlackRule. This manipulation of the argument deviceList causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized.

Frequently asked questions

What is CVE-2026-2876?: A vulnerability was determined in Tenda A18 15.13.07.13. This affects the function parse_macfilter_rule of the file /goform/setBlackRule. This manipulation of the argument deviceList causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized.
How severe is CVE-2026-2876?: CVE-2026-2876 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-2026-2876 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2876?: CVE-2026-2876 affects Tenda A18 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2876?: 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-2026-2876 have an EU (EUVD) identifier?: Yes. CVE-2026-2876 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7590.
When was CVE-2026-2876 published?: CVE-2026-2876 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-2026-2877 — High (CVSS 8.8): A vulnerability has been found in Tenda A18 15.13.07.13. This affects the function strcpy 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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