VulnerabilityPublished 2 Nov 2026

CVE-2026-117082: Universal Plug · An Authentication Bypass

Source CVE Database V5

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Not known to be exploited.

Data as of 2 Nov 2026, 21:45 UTC

Severity

High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Exploitation evidence

Disclosed: evidence found.
CVE published 2 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Description

CVE-2026-117082 is an authentication bypass vulnerability in the Universal Plug and Play (UPnP) framework of the Sercomm AOT-4221SR 4.6 Dual Band GPON ONU device. It allows attackers to send arbitrary SOAP requests via port 5555 without authentication. This exposes 15 administrative, WAN, LAN, and firewall services, enabling attackers to modify routing tables, change DNS settings, remove firewall rules, and fully compromise the network.

Impact

The authentication bypass allows attackers to access and manipulate 15 key administrative and network services without credentials. This can result in unauthorized modification of routing tables, DNS server settings, and firewall rules, effectively compromising the entire network's security and control.

Summary

This vulnerability in the UPnP framework of the Sercomm AOT-4221SR device permits unauthenticated attackers to execute arbitrary SOAP requests through port 5555. The flaw bypasses authentication controls, exposing multiple critical services related to network administration and security. Attackers can leverage this to alter core routing configurations, DNS servers, and firewall rules, leading to complete network compromise.

References

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