Beetel 777VR1 UART access control

published 2026-01-26 9 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-4685

cvss: 6.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits: 0; none known

A flaw has been found in Beetel 777VR1 up to 01.00.09/01.00.09_55. The affected element is an unknown function of the component UART Interface. This manipulation causes improper access controls. It is feasible to perform the attack on the physical device. The complexity of an attack is rather high. The exploitability is described as difficult. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 9 mo ago (2026-01-26)

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

gist.github.com https://gist.github.com/raghav20232023/ea6adcd6d1eca35683570a1094164bd3 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	5.4	CVSS:4.0/AV:P/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
CNA	3.1	6.1	CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
CNA	3.0	6.1	CVSS:3.0/AV:P/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
CNA	2.0	5.9	AV:L/AC:H/Au:M/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
CNA	4.0	4.5	CVSS:4.0/AV:P/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	6.1	CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CNA	2.0	5.9	AV:L/AC:H/Au:M/C:C/I:C/A:C

Affected products

Beetel 777VR1

Classification

Weakness

CWE-284 Improper Access Control
CWE-266 Incorrect Privilege Assignment

References

gist.github.com /raghav20232023/ea6adcd6d1eca35683570a1094164bd3
exploit, mitigation, third-party-advisory
vuldb.com /?id.342800
vdb-entry, technical-description, third-party-advisory
vuldb.com /?ctiid.342800
signature, permissions-required, vdb-entry
vuldb.com /?submit.740674
third-party-advisory, vdb-entry

Sources

CVE List CVE-2026-1411
NVD CVE-2026-1411

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary