CVE-2021-27139Public exploitNetwork attack vector

Unauthenticated device data disclosure via exposed info page

Published Feb 10, 2021 · Updated Aug 3, 2024

Information disclosure in FiberHome HG6245D firmware through RP2613 allows remote attackers to read device and network data via /info.asp. The HTTP server returns the information page without authenticating the request when client-side JavaScript is disabled, exposing the software version, LOID, interface addresses, DHCP clients, and WAN MAC. Network access to the management service is required; it listens on the LAN by default and is also reachable from the WAN over unfiltered IPv6.

CVSS severity7.5
High
EPSS probability16.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in FiberHome HG6245D firmware through RP2613 allows remote attackers to read device and network data via /info.asp. The HTTP server returns the information page without authenticating the request when client-side JavaScript is disabled, exposing the software version, LOID, interface addresses, DHCP clients, and WAN MAC. Network access to the management service is required; it listens on the LAN by default and is also reachable from the WAN over unfiltered IPv6.

The record

CVE
CVE-2021-27139
Published
Feb 10, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1552
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 10, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 vectornetwork
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:P/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1552Unsecured Credentials

Public exploit references

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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