Quick answers
- Is CVE-2026-18897 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-18897 being exploited in the wild.
- How severe is CVE-2026-18897?
- High severity, with a CVSS score of 8.8, published 5 August 2026.
- Which products and versions are affected?
- UTT HiPER 1250GW up to v3.2.7-210907-180535.
- Is there a fix for CVE-2026-18897?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-18897 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-18897?
- Check whether you run UTT HiPER 1250GW at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a stack-based buffer overflow in the /goform/getOneApConfTempEntry endpoint, triggered by the tempName parameter passed to an unsafe strcpy() function. The vulnerable code does not validate the length of user-supplied input before copying it into a fixed-size stack buffer, allowing an attacker to overflow the buffer with arbitrary data. An attacker with network access to the router's web interface (typically requiring authentication via Digest auth, though the advisory indicates remote exploitation) can trigger a denial of service by crashing the device, or potentially achieve code execution by carefully crafting a payload with a return address. A public exploit is available and the vendor has not responded to disclosure attempts.
Affected products
- UTT HiPER 1250GW up to v3.2.7-210907-180535
Timeline
- 2026-08-05: disclosed: Vulnerability published on NVD
- 2026-08-05: other: Vendor was contacted early but did not respond