How severe is CVE-2025-63456?

CVE-2025-63456 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-63456 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-63456?

CVE-2025-63456 affects Tenda Ax1803 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-63456?

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-2025-63456 have an EU (EUVD) identifier?

Yes. CVE-2025-63456 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-48945.

When was CVE-2025-63456 published?

CVE-2025-63456 was published on 2025-11-10 and last updated on 2026-06-17.

CVE-2025-63456

CVE-2025-63456 is a high-severity vulnerability in Tenda Ax1803 Firmware with a CVSS 3.x base score of 7.5. 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 7.5)
EPSS exploit prediction: 0% (28th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-48945
Weakness: CWE-787
Affected product: Tenda Ax1803 Firmware
Published: 2025-11-10
Last modified: 2026-06-17

Description

Tenda AX-1803 v1.0.0.1 was discovered to contain a stack overflow via the time parameter in the SetSysTimeCfg function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.

Frequently asked questions

What is CVE-2025-63456?: Tenda AX-1803 v1.0.0.1 was discovered to contain a stack overflow via the time parameter in the SetSysTimeCfg function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request.
How severe is CVE-2025-63456?: CVE-2025-63456 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-63456 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (28th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-63456?: CVE-2025-63456 affects Tenda Ax1803 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-63456?: 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-2025-63456 have an EU (EUVD) identifier?: Yes. CVE-2025-63456 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-48945.
When was CVE-2025-63456 published?: CVE-2025-63456 was published on 2025-11-10 and last updated on 2026-06-17.

References

https://github.com/0-fool/VulnbyCola/blob/main/Tenda/AX-1803/3/1.md

Affected products (1)

cpe:2.3:o:tenda:ax1803_firmware:1.0.0.1:*:*:*:*:*:*:*

More vulnerabilities in Tenda Ax1803 Firmware

CVE-2024-30621 — Critical (CVSS 9.8): Tenda AX1803 v1.0.0.1 contains a stack overflow via the serverName parameter in the function fromAdvSetMacMtuWan.
CVE-2024-30620 — Critical (CVSS 9.8): Tenda AX1803 v1.0.0.1 contains a stack overflow via the serviceName parameter in the function fromAdvSetMacMtuWan.
CVE-2023-51970 — Critical (CVSS 9.8): Tenda AX1803 v1.0.0.1 contains a stack overflow via the iptv.stb.mode parameter in the function formSetIptv.
CVE-2023-51969 — Critical (CVSS 9.8): Tenda AX1803 v1.0.0.1 contains a stack overflow via the iptv.city.vlan parameter in the function getIptvInfo.
CVE-2023-51968 — Critical (CVSS 9.8): Tenda AX1803 v1.0.0.1 contains a stack overflow via the adv.iptv.stballvlans parameter in the function getIptvInfo.
CVE-2023-51967 — Critical (CVSS 9.8): Tenda AX1803 v1.0.0.1 contains a stack overflow via the iptv.stb.port parameter in the function getIptvInfo.

All CVEs affecting Tenda Ax1803 Firmware →

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