How severe is CVE-2023-51956?

CVE-2023-51956 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-2023-51956 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-51956?

CVE-2023-51956 affects Tenda Ax1803 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-51956?

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-2023-51956 have an EU (EUVD) identifier?

Yes. CVE-2023-51956 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-56636.

When was CVE-2023-51956 published?

CVE-2023-51956 was published on 2024-01-10 and last updated on 2026-06-17.

CVE-2023-51956

CVE-2023-51956 is a critical-severity vulnerability in Tenda Ax1803 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-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-56636
Weakness: CWE-787
Affected product: Tenda Ax1803 Firmware
Published: 2024-01-10
Last modified: 2026-06-17

Description

Tenda AX1803 v1.0.0.1 contains a stack overflow via the iptv.city.vlan parameter in the function formSetIptv

Frequently asked questions

What is CVE-2023-51956?: Tenda AX1803 v1.0.0.1 contains a stack overflow via the iptv.city.vlan parameter in the function formSetIptv
How severe is CVE-2023-51956?: CVE-2023-51956 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-2023-51956 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-51956?: CVE-2023-51956 affects Tenda Ax1803 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-51956?: 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-2023-51956 have an EU (EUVD) identifier?: Yes. CVE-2023-51956 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-56636.
When was CVE-2023-51956 published?: CVE-2023-51956 was published on 2024-01-10 and last updated on 2026-06-17.

References

https://grove-laser-8ad.notion.site/Tenda-AX1803-Buffer-Overflow-in-formSetIptv-d758f5dba8f646afaf5cddc6f8d3ec70

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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