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Vulnerability record · CVE-2022-32548 · published 29 August 2022

CVE-2022-32548: Draytek vigor3910 firmware classic buffer overflow vulnerability

Draytek · Vigor3910 Firmware

An issue was discovered on certain DrayTek Vigor routers before July 2022 such as the Vigor3910 before 4.3.1.1. /cgi-bin/wlogin.cgi has a buffer overflow via the username or password to the aa or ab field.

9.8 CVSS 3.1 Critical EPSS 34% · top 1.7% CWE-120 · Classic buffer overflow
9.8CVSS 3.1 base score
34%EPSS exploitation probability, 30 days
NoNot in CISA KEV
68Affected product versions listed by NVD
4References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue was discovered on certain DrayTek Vigor routers before July 2022 such as the Vigor3910 before 4.3.1.1. /cgi-bin/wlogin.cgi has a buffer overflow via the username or password to the aa or ab field.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

68 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.securityweek.com/smbs-exposed-attacks-critical-vulnerability-draytek-vigor-routers ExploitThird Party Advisory
https://www.trellix.com/en-us/about/newsroom/stories/threat-labs/rce-in-dratyek-routers.html ExploitThird Party Advisory
https://www.securityweek.com/smbs-exposed-attacks-critical-vulnerability-draytek-vigor-routers ExploitThird Party Advisory
https://www.trellix.com/en-us/about/newsroom/stories/threat-labs/rce-in-dratyek-routers.html ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-51138Draytek vigor3912 firmware stack-based buffer overflow vulnerabilityVigor165/166 4.2.7 and earlier; Vigor2620/LTE200 3.9.8.9 and earlier; Vigor2860/2925 3.9.8 and earlier; Vigor2862/2926 3.9.9.5 and earlier; Vigor2133…EPSS 1.1%9.8CVE-2024-51139Draytek vigor2620 firmware classic buffer overflow vulnerabilityBuffer Overflow vulnerability in Vigor2620/LTE200 3.9.8.9 and earlier and Vigor2860/2925 3.9.8 and earlier and Vigor2862/2926 3.9.9.5 and earlier and…EPSS 1.00%9.8CVE-2024-41593Draytek vigor3912 firmware out-of-bounds write vulnerabilityDrayTek Vigor310 devices through 4.3.2.6 allow a remote attacker to execute arbitrary code via the function ft_payload_dns(), because a byte sign-ext…EPSS 0.89%9.8CVE-2023-33778Draytek myvigor hard-coded credentials vulnerabilityDraytek Vigor Routers firmware versions below 3.9.6/4.2.4, Access Points firmware versions below v1.4.0, Switches firmware versions below 2.6.7, and …EPSS 0.59%8.8CVE-2024-41334Draytek vigor166 firmware improper certificate validation vulnerabilityDraytek devices Vigor 165/166 prior to v4.2.6 , Vigor 2620/LTE200 prior to v3.9.8.8, Vigor 2860/2925 prior to v3.9.7, Vigor 2862/2926 prior to v3.9.9…EPSS 0.38%8.8CVE-2024-41339Draytek vigor165 firmware unrestricted file upload vulnerabilityAn issue in the CGI endpoint used to upload configurations in Draytek devices Vigor 165/166 prior to v4.2.6 , Vigor 2620/LTE200 prior to v3.9.8.8, Vi…EPSS 0.65%8.4CVE-2024-41340Draytek vigor165 firmware unrestricted file upload vulnerabilityAn issue in Draytek devices Vigor 165/166 prior to v4.2.6 , Vigor 2620/LTE200 prior to v3.9.8.8, Vigor 2860/2925 prior to v3.9.7, Vigor 2862/2926 pri…EPSS 0.21%8.0CVE-2024-41588Draytek vigor2620 firmware classic buffer overflow vulnerabilityThe CGI endpoints v2x00.cgi and cgiwcg.cgi of DrayTek Vigor3910 devices through 4.3.2.6 are vulnerable to buffer overflows, by authenticated users, b…EPSS 0.33%

Source: NIST National Vulnerability Database (record CVE-2022-32548), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.