How severe is CVE-2026-6123?

CVE-2026-6123 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-2026-6123 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-6123?

CVE-2026-6123 affects Tenda F451 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-6123?

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-2026-6123 have an EU (EUVD) identifier?

Yes. CVE-2026-6123 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21724.

When was CVE-2026-6123 published?

CVE-2026-6123 was published on 2026-04-12 and last updated on 2026-06-17.

CVE-2026-6123

CVE-2026-6123 is a high-severity vulnerability in Tenda F451 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% (40th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21724
Weakness: CWE-119
Affected product: Tenda F451 Firmware
Published: 2026-04-12
Last modified: 2026-06-17

Description

A vulnerability was found in Tenda F451 1.0.0.7. This affects the function fromAddressNat of the file /goform/addressNat of the component httpd. Performing a manipulation of the argument entrys results in stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made public and could be used.

Frequently asked questions

What is CVE-2026-6123?: A vulnerability was found in Tenda F451 1.0.0.7. This affects the function fromAddressNat of the file /goform/addressNat of the component httpd. Performing a manipulation of the argument entrys results in stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made public and could be used.
How severe is CVE-2026-6123?: CVE-2026-6123 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-2026-6123 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-6123?: CVE-2026-6123 affects Tenda F451 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-6123?: 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-2026-6123 have an EU (EUVD) identifier?: Yes. CVE-2026-6123 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21724.
When was CVE-2026-6123 published?: CVE-2026-6123 was published on 2026-04-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:f451_firmware:1.0.0.7:*:*:*:*:*:*:*

More vulnerabilities in Tenda F451 Firmware

CVE-2026-6137 — High (CVSS 8.8): A vulnerability was detected in Tenda F451 1.0.0.7_cn_svn7958. The affected element is the function fromAdvSetWan of…
CVE-2026-6136 — High (CVSS 8.8): A security vulnerability has been detected in Tenda F451 1.0.0.7_cn_svn7958. Impacted is the function frmL7ImForm of…
CVE-2026-6135 — High (CVSS 8.8): A weakness has been identified in Tenda F451 1.0.0.7_cn_svn7958. This issue affects the function fromSetIpBind of the…
CVE-2026-6134 — High (CVSS 8.8): A security flaw has been discovered in Tenda F451 1.0.0.7_cn_svn7958. This vulnerability affects the function…
CVE-2026-6133 — High (CVSS 8.8): A vulnerability was identified in Tenda F451 1.0.0.7_cn_svn7958. This affects the function fromSafeUrlFilter of the…
CVE-2026-6124 — High (CVSS 8.8): A vulnerability was determined in Tenda F451 1.0.0.7. This vulnerability affects the function fromSafeMacFilter of the…

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