CVE-2026-1420
CVE-2026-1420 is a high-severity vulnerability in Tenda Ac23 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: 4% (88th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-4691
- Weakness: CWE-119
- Affected product: Tenda Ac23 Firmware
- Published:
- Last modified:
Description
A flaw has been found in Tenda AC23 16.03.07.52. This impacts an unknown function of the file /goform/WifiExtraSet. This manipulation of the argument wpapsk_crypto causes buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.
Frequently asked questions
- What is CVE-2026-1420?
- A flaw has been found in Tenda AC23 16.03.07.52. This impacts an unknown function of the file /goform/WifiExtraSet. This manipulation of the argument wpapsk_crypto causes buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.
- How severe is CVE-2026-1420?
- CVE-2026-1420 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-2026-1420 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-1420?
- CVE-2026-1420 affects Tenda Ac23 Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-1420?
- 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-2026-1420 have an EU (EUVD) identifier?
- Yes. CVE-2026-1420 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4691.
- When was CVE-2026-1420 published?
- CVE-2026-1420 was published on 2026-01-26 and last updated on 2026-06-17.
References
- https://github.com/xyh4ck/iot_poc/blob/main/Tenda%20AC23_Buffer_Overflow_WifiExtraSet/Tenda%20AC23_Buffer_Overflow_WifiExtraSet.md
- https://github.com/xyh4ck/iot_poc/blob/main/Tenda%20AC23_Buffer_Overflow_WifiExtraSet/Tenda%20AC23_Buffer_Overflow_WifiExtraSet.md#poc
- https://vuldb.com/?ctiid.342836
- https://vuldb.com/?id.342836
- https://vuldb.com/?submit.736559
- https://www.tenda.com.cn/
Affected products (1)
- cpe:2.3:o:tenda:ac23_firmware:16.03.07.52:*:*:*:*:*:*:*
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- CVE-2022-43106 — Critical (CVSS 9.8): Tenda AC23 V16.03.07.45_cn was discovered to contain a stack overflow via the schedStartTime parameter in the…
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