How severe is CVE-2026-30814?

CVE-2026-30814 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-30814 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-30814?

CVE-2026-30814 affects Tp-link Archer Ax53 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-30814?

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-2026-30814 have an EU (EUVD) identifier?

Yes. CVE-2026-30814 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20542.

When was CVE-2026-30814 published?

CVE-2026-30814 was published on 2026-04-08 and last updated on 2026-06-17.

CVE-2026-30814

CVE-2026-30814 is a high-severity vulnerability in Tp-link Archer Ax53 Firmware with a CVSS 3.x base score of 8.0. 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-787.

Key facts

Severity: High (CVSS 3.x base score 8.0)
CVSS v4: 7.3
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20542
Weakness: CWE-787
Affected product: Tp-link Archer Ax53 Firmware
Published: 2026-04-08
Last modified: 2026-06-17

Description

A stack-based buffer overflow in the tmpServer module of TP-Link Archer AX53 v1.0 allows an authenticated adjacent attacker to trigger a segmentation fault and potentially execute arbitrary code via a specially crafted configuration file. Successful exploitation may cause a crash and could allow arbitrary code execution, enabling modification of device state, exposure of sensitive data, or further compromise of device integrity. This issue affects AX53 v1.0: before 1.7.1 Build 20260213.

Frequently asked questions

What is CVE-2026-30814?: A stack-based buffer overflow in the tmpServer module of TP-Link Archer AX53 v1.0 allows an authenticated adjacent attacker to trigger a segmentation fault and potentially execute arbitrary code via a specially crafted configuration file. Successful exploitation may cause a crash and could allow arbitrary code execution, enabling modification of device state, exposure of sensitive data, or further compromise of device integrity. This issue affects AX53 v1.0: before 1.7.1 Build 20260213.
How severe is CVE-2026-30814?: CVE-2026-30814 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-30814 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-30814?: CVE-2026-30814 affects Tp-link Archer Ax53 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-30814?: 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-2026-30814 have an EU (EUVD) identifier?: Yes. CVE-2026-30814 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20542.
When was CVE-2026-30814 published?: CVE-2026-30814 was published on 2026-04-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tp-link:archer_ax53_firmware:*:*:*:*:*:*:*:*

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