CVE-2020-6972Network attack vector

Authentication bypass via replayed browser traffic

Published Mar 24, 2020 · Updated Aug 4, 2024

Authentication bypass in Honeywell NOTI-FIRE-NET Web Server 3.50 and earlier allows remote attackers to access protected web functions. The web authentication accepts previously captured browser traffic when it is replayed, treating the replay as a valid authenticated request. Network access and traffic from a valid browser session are required; replay grants that session's access to fire-alarm event history, status, and device properties.

CVSS severity9.3
Critical
EPSS probability1.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Honeywell NOTI-FIRE-NET Web Server 3.50 and earlier allows remote attackers to access protected web functions. The web authentication accepts previously captured browser traffic when it is replayed, treating the replay as a valid authenticated request. Network access and traffic from a valid browser session are required; replay grants that session's access to fire-alarm event history, status, and device properties.

The record

CVE
CVE-2020-6972
Published
Mar 24, 2020
Updated
Aug 4, 2024
Vendor
Honeywell Technologies
Product
NOTI-FIRE-NET Web Server
Classifications
CWE-294, CAPEC-60
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 24, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Notifier Web Server (NWS) Version 3.50 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Honeywell Technologies · NOTI-FIRE-NET Web Serverversion=Notifier Web Server (NWS) Version 3.50 and earlier

Published CVSS scores

9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
6.4NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:N
9.3HoneywellCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-294Authentication Bypass by Capture-replay
CAPEC-60Reusing Session IDs (aka Session Replay)

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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