CVE-2025-68706: A stack-based buffer overflow exists in the GoAhead-Webs HTTP daemon on KuWFi 4G LTE AC900 devices with firmwa

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CRITICAL 9.8REMOTEMITIGATE

CVE-2025-68706 is a critical-severity flaw (CVSS 9.8) affecting ac900 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A stack-based buffer overflow exists in the GoAhead-Webs HTTP daemon on KuWFi 4G LTE AC900 devices with firmware 1.0.13. The /goform/formMultiApnSetting handler uses sprintf() to copy the user-supplied pincode parameter into a fixed 132-byte stack buffer with no bounds checks. This allows an attacker to corrupt adjacent stack memory, crash the web server, and (under certain conditions) may enable arbitrary code execution.

Why this priority

Critical severity
EPSS top 8%: very likely to be exploited
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	5.0% (top 8%)
CISA exploited list	No
Weakness	CWE-121
Published	2025-12-29
Last modified	2026-10-13

Publisher (CNA): MITRE · Vendor: kuwfi

Last updated 2026-10-13 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-29 19:15 UTCPublished CVE record published
2026-10-13 10:10 UTCUpdated Record last modified

kuwfi ac900 firmware MITIGATE

Affected: 1.0.13

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.13

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · amule · FIXED · 3.2.0-1.fc46 · FEDORA-2026-4feb2647b0 · source

sudo dnf upgrade --advisory=FEDORA-2026-4feb2647b0

Fedora ELN · mysql9.7 · FIXED · 9.7.4-3.eln159 · FEDORA-2026-ea1c50e49b · source

sudo dnf upgrade --advisory=FEDORA-2026-ea1c50e49b

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-68706?

ac900 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-68706 being exploited?

CVE-2025-68706 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-68706 affect?

CVE-2025-68706 affects ac900 firmware. Severity is critical (CVSS 9.8). A stack-based buffer overflow exists in the GoAhead-Webs HTTP daemon on KuWFi 4G LTE AC900 devices with firmware 1.0.13. The /goform/formMultiApnSetting handler uses sprintf() to copy the user-supplied pincode parameter into a fixed 132-byt

How urgent is CVE-2025-68706?

Priority 65/100. Critical severity; EPSS top 8%: very likely to be exploited; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

References

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