CVE-2020-1860

Internet access via firewall policy bypass

Published Feb 28, 2020 · Updated Aug 4, 2024

Access control bypass in Huawei NIP6800, Secospace USG6600, and USG9500 allows remote attackers on the internal network to reach the Internet. The published workaround filters outbound DNS messages by destination, but Huawei has not disclosed the faulty access-control operation. Exploitation requires internal-network access and bypasses firewall policy to provide direct Internet connectivity; no other impact is reported.

CVSS severity4.3
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Access control bypass in Huawei NIP6800, Secospace USG6600, and USG9500 allows remote attackers on the internal network to reach the Internet. The published workaround filters outbound DNS messages by destination, but Huawei has not disclosed the faulty access-control operation. Exploitation requires internal-network access and bypasses firewall policy to provide direct Internet connectivity; no other impact is reported.

The record

CVE
CVE-2020-1860
Published
Feb 28, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1599
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 28, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
4.3HuaweiCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
4.0HuaweiCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:F/RL:O/RC:C
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1599Network Boundary Bridging

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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