November 15, 2026

CVE Watchtower

CVE-2026-129453DrayTek Vigor2960 Heap-based Buffer Overflow

NVD

Vulnerability Summary

A vulnerability was found in DrayTek Vigor2960 1.5.1.6. This issue affects the function check_file_exist of the file /cgi-bin/mainfunction.cgi of the component File Existence Check. Performing a manipulation of the argument upload_name results in heap-based buffer overflow. The attack may be initiated remotely. The exploit has been made public and could be used. Upgrading to version 1.5.1.7 is capable of addressing this issue. Upgrading the affected component is recommended. The vendor recommends: "1.5.1.6 isn't the latest version of 2960, the latest version fixes many security issues. And we have another one in our release plan which should solve the issues reported."
Severity Level
CRITICAL(9.4)
Published Date
Nov 15, 2026
Last Modified
Nov 15, 2026
Exploitation Status
Public exploit available
Root Weakness (CWE)
CWE-122: Heap-based Buffer Overflow β†—
The buffer being overwritten is allocated in the heap portion of memory.
CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer β†—
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the intended boundary of the buffer.
CVSS v4.0 Base Metrics — Score 9.4 (CRITICAL)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
Attack VectorNetwork
Attack ComplexityLow
Attack RequirementsNone
Privileges RequiredLow
User InteractionNone
Confidentiality (Vulnerable System)High
Integrity (Vulnerable System)High
Availability (Vulnerable System)High
Confidentiality (Subsequent System)High
Integrity (Subsequent System)High
Availability (Subsequent System)High
Show CVSS v3.x metrics (score 9.9)
CVSS v3.1 Base Metrics — Score 9.9 (CRITICAL)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • DrayTek Vigor2960 1.5.1.6
Patched Versions
No patched version published yet
Until a fix ships, reduce exposure:
  • Restrict access to the affected service or interface to trusted networks.
  • Disable the affected feature if you do not need it.
  • Watch the vendor advisory for a firmware or software update.

What to do

Prioritize this fix. Exploit code is public, so attacks can follow quickly.

  1. Check whether you run DrayTek Vigor2960 and which version.
  2. No patched version is listed yet. Limit access to the affected service to trusted networks, and disable the feature if you can.
  3. Subscribe to the vendor advisory so you learn when a fix ships.
  4. Review logs and exposed services for signs of earlier compromise.

Timeline

  • Nov 15, 2026Published
  • Nov 15, 2026Record last modified

Score, severity and exploitation changes are tracked from the day Watchtower started logging them.

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External References

Data last checked: Nov 15, 2026 13:11 UTC