CVE-2023-27100

criticalpriority · attend · 52EPSS 0.098 · 96 %ileexploit · PoCDEEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · PoC

Likely / severe?

9.84% (96th) EPSS

CVSS 9.8 · critical

Is it mine?

5 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-26

Improper restriction of excessive authentication attempts in the SSHGuard component of Netgate pfSense Plus software v22.05.1 and pfSense CE software v2.6.0 allows attackers to bypass brute force protection mechanisms via crafted web requests.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 3.9 · impact 5.9

v3.19.3criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-307USprimary

exploits (2)

Public proof-of-concept and weaponised exploit code.

EDB-51352pfsenseCE v2.6.0 - Anti-brute force protection bypassPoC · exploit_db
fabdotnet/CVE-2023-27100fabdotnet/CVE-2023-27100PoC · poc_in_github

affected products (5)

Products and version ranges known to be affected.

Netgate pfSense CE <= 2.6.0all versionscert_bundDEcpe:/a:netgate:pfsense:ce__2.6.0
Netgate pfSense plus <= 22.05.1all versionscert_bundDEcpe:/a:netgate:pfsense:plus__22.05.1
n/a n/a≤ n/aenisa_euvdEU
netgate pfsense plus= 22.05.1nvdUScpe:2.3:a:netgate:pfsense_plus:*:*:*:*:*:*:*:*
pfsense pfsense= 2.6.0nvdUScpe:2.3:a:pfsense:pfsense:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-0731Netgate pfSense: Schwachstelle ermöglicht Umgehen von SicherheitsvorkehrungenDeutsch2023-03-22csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Netgate pfSense ausnutzen, um Sicherheitsvorkehrungen zu umgehen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2023-03-22modified 2026-06-17

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Related entries.

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+818 more

references (14)

External citations — patches, advisories, analysis.

scry

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