How severe is CVE-2021-43702?

CVE-2021-43702 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-43702 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-43702?

CVE-2021-43702 primarily affects Asus Zenwifi Xd4s Firmware. In total, 93 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-43702?

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.

When was CVE-2021-43702 published?

CVE-2021-43702 was published on 2022-07-05 and last updated on 2026-06-17.

CVE-2021-43702

CVE-2021-43702 is a critical-severity vulnerability in Asus Zenwifi Xd4s Firmware with a CVSS 3.x base score of 9.0. 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-79.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
CVSS v2: 3.5
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Asus Zenwifi Xd4s Firmware
Published: 2022-07-05
Last modified: 2026-06-17

Description

ASUS RT-A88U 3.0.0.4.386_45898 is vulnerable to Cross Site Scripting (XSS). The ASUS router admin panel does not sanitize the WiFI logs correctly, if an attacker was able to change the SSID of the router with a custom payload, they could achieve stored XSS on the device.

Frequently asked questions

What is CVE-2021-43702?: ASUS RT-A88U 3.0.0.4.386_45898 is vulnerable to Cross Site Scripting (XSS). The ASUS router admin panel does not sanitize the WiFI logs correctly, if an attacker was able to change the SSID of the router with a custom payload, they could achieve stored XSS on the device.
How severe is CVE-2021-43702?: CVE-2021-43702 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-43702 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-43702?: CVE-2021-43702 primarily affects Asus Zenwifi Xd4s Firmware. In total, 93 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-43702?: 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.
When was CVE-2021-43702 published?: CVE-2021-43702 was published on 2022-07-05 and last updated on 2026-06-17.

References

Affected products (93)

cpe:2.3:o:asus:zenwifi_xd4s_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:zenwifi_xt9_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:zenwifi_xd5_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:zenwifi_pro_et12_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:zenwifi__pro_xt12_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:zenwifi_ax_hybrid_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:zenwifi_et8_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:zenwifi_xd6_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:zenwifi_ac_mini_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:zenwifi_ax_mini_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:zenwifi_ax_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:zenwifi_ac_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ac66u_b1_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ax88u_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ax82u_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ax89x_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ax92u_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ax86u_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ax68u_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ax3000_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ax58u_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ax55_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ax56u_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ac66u\+_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rog_rapture_gt-ac5300_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rog_rapture_gt-ax11000_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rog_rapture_gt-ac2900_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ac1300uhp_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ac1300g\+_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:tuf_gaming_ax5400_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:tuf_gaming_ax3000_v2_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ac1200_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ac5300_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ac1200g_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ac1200hp_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ac1200g\+_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ac1200e_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ac1200gu_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ac3100_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*
cpe:2.3:o:asus:rt-ac58u_firmware:3.0.0.4.386.46061:*:*:*:*:*:*:*

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