Draytek Vigor 3910 v4.3.2.6 was discovered to contain a buffer overflow in the profname parameter at v2x00.cgi.

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• draytek vigor3910 firmware4.3.2.6

Other highest-scoring records for the same primary product.

• CVE-2022-32548An issue was discovered on certain DrayTek Vigor routers before July 2022 such as the Vigor3910 before 4.3.1.1.
  49Plan
• CVE-2024-41589DrayTek Vigor310 devices through 4.3.2.6 use unencrypted HTTP for authentication requests.
  35Monitor
• CVE-2024-41595DrayTek Vigor310 devices through 4.3.2.6 allow a remote attacker to change settings or cause a denial of service via .cgi pages because of m
  32Monitor
• CVE-2024-41586A stack-based Buffer Overflow vulnerability in DrayTek Vigor310 devices through 4.3.2.6 allows a remote attacker to execute arbitrary code v
  32Monitor
• CVE-2024-46598Draytek Vigor 3910 v4.3.2.6 was discovered to contain a buffer overflow in the iprofileidx parameter at dialin.cgi.
  30Monitor
• CVE-2024-46597Draytek Vigor 3910 v4.3.2.6 was discovered to contain a buffer overflow in the sPubKey parameter at dialin.cgi.
  30Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

When data is copied, the source length is not compared with the size of the destination buffer. Excess data overwrites adjacent memory.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1char buf[256];2memcpy(buf, pkt->data, pkt->len);

1char buf[256];2if (pkt->len > sizeof(buf)) {3  return -EINVAL;4}5memcpy(buf, pkt->data, pkt->len);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.