How severe is CVE-2026-5830?

CVE-2026-5830 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-2026-5830 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5830?

CVE-2026-5830 affects Tenda Ac15 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-5830?

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-2026-5830 have an EU (EUVD) identifier?

Yes. CVE-2026-5830 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20828.

When was CVE-2026-5830 published?

CVE-2026-5830 was published on 2026-04-09 and last updated on 2026-06-17.

CVE-2026-5830

CVE-2026-5830 is a high-severity vulnerability in Tenda Ac15 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% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-20828
Weakness: CWE-119
Affected product: Tenda Ac15 Firmware
Published: 2026-04-09
Last modified: 2026-06-17

Description

A vulnerability was identified in Tenda AC15 15.03.05.18. This affects the function websGetVar of the file /goform/SysToolChangePwd. Such manipulation of the argument oldPwd/newPwd/cfmPwd leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used.

Frequently asked questions

What is CVE-2026-5830?: A vulnerability was identified in Tenda AC15 15.03.05.18. This affects the function websGetVar of the file /goform/SysToolChangePwd. Such manipulation of the argument oldPwd/newPwd/cfmPwd leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used.
How severe is CVE-2026-5830?: CVE-2026-5830 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-2026-5830 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5830?: CVE-2026-5830 affects Tenda Ac15 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-5830?: 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-2026-5830 have an EU (EUVD) identifier?: Yes. CVE-2026-5830 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-20828.
When was CVE-2026-5830 published?: CVE-2026-5830 was published on 2026-04-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:ac15_firmware:15.03.05.18:*:*:*:*:*:*:*

More vulnerabilities in Tenda Ac15 Firmware

CVE-2026-24103 — Critical (CVSS 9.8): A buffer overflow vulnerability was discovered in goform/formSetMacFilterCfg in Tenda AC15V1.0 V15.03.05.18_multi.
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CVE-2025-25632 — Critical (CVSS 9.8): Tenda AC15 v15.03.05.19 is vulnerable to Command Injection via the handler function in /goform/telnet.

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