CVE-2022-32548
CWE-120Published: August 29, 2022· Updated: Jun 17, 2026
Official 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.
Risk Analysis
DrayTek Vigor routers, including the Vigor3910, contain a buffer overflow vulnerability in the login interface. This critical flaw allows remote attackers to potentially crash the device or execute arbitrary code.
No public exploit is known, and the vulnerability is not in the KEV catalog. The flaw is remotely exploitable with low complexity.
Update the router firmware to version 4.3.1.1 or later as recommended by the manufacturer.
Technical Analysis
CVE-2022-32548 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (4)
Quick Facts
Related CVEs (CWE-120)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2022-32548 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts