How severe is CVE-2026-51845?

CVE-2026-51845 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-51845 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-51845?

CVE-2026-51845 affects Tenda Ac7 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-51845?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-51845 have an EU (EUVD) identifier?

Yes. CVE-2026-51845 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38051.

When was CVE-2026-51845 published?

CVE-2026-51845 was published on 2026-06-19 and last updated on 2026-07-09.

CVE-2026-51845

CVE-2026-51845 is a critical-severity vulnerability in Tenda Ac7 Firmware with a CVSS 3.x base score of 9.8. 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-121.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38051
Weakness: CWE-121
Affected product: Tenda Ac7 Firmware
Published: 2026-06-19
Last modified: 2026-07-09

Description

Tenda AC7 v15.03.06.44 contains a stack buffer overflow vulnerability in the /goform/AdvSetMacMtuWan interface via the mac parameter.

Frequently asked questions

What is CVE-2026-51845?: Tenda AC7 v15.03.06.44 contains a stack buffer overflow vulnerability in the /goform/AdvSetMacMtuWan interface via the mac parameter.
How severe is CVE-2026-51845?: CVE-2026-51845 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-51845 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-51845?: CVE-2026-51845 affects Tenda Ac7 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-51845?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-51845 have an EU (EUVD) identifier?: Yes. CVE-2026-51845 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38051.
When was CVE-2026-51845 published?: CVE-2026-51845 was published on 2026-06-19 and last updated on 2026-07-09.

References

https://www.kdev.site/cve-request_007/

Affected products (1)

cpe:2.3:o:tenda:ac7_firmware:15.03.06.44:*:*:*:*:*:*:*

More vulnerabilities in Tenda Ac7 Firmware

CVE-2026-51846 — Critical (CVSS 9.8): In Tenda AC7 v15.03.06.44, the wanSpeed parameter of the route /goform/AdvSetMacMtuWan has a stack buffer overflow…
CVE-2026-51844 — Critical (CVSS 9.8): Tenda AC7 v15.03.06.44 contains a stack buffer overflow vulnerability in the /goform/AdvSetMacMtuWan interface via the…
CVE-2026-51843 — Critical (CVSS 9.8): Tenda AC7 v15.03.06.44 contains a stack buffer overflow vulnerability in the /goform/AdvSetMacMtuWan interface via the…
CVE-2025-29135 — Critical (CVSS 9.8): A stack-based buffer overflow vulnerability in Tenda AC7 V15.03.06.44 allows a remote attacker to execute arbitrary…
CVE-2025-29137 — Critical (CVSS 9.8): Tenda AC7 V1.0 V15.03.06.44 found a buffer overflow caused by the timeZone parameter in the form_fast_setting_wifi_set…
CVE-2024-32301 — Critical (CVSS 9.8): Tenda AC7V1.0 v15.03.06.44 firmware has a stack overflow vulnerability via the PPW parameter in the fromWizardHandle…

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