9.6

CVE-2021-26088: fortinet fortinet fsso windows dc agent, fsso windows ca Improper Authentication

Modified
Published 12-07-2021Last modified 25-10-2024

Vulnerability summary

CVE-2021-26088 is a critical (CVSS 9.6) Improper Authentication vulnerability in fortinet fortinet fsso windows dc agent, fsso windows ca. EPSS estimates a 1.03% chance of exploitation in the next 30 days, higher than 63.4% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.6/10
010
Critical · v3.1 (NVD)
EPSS score
1.03%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 12-07-2021
    PublishedVulnerability first disclosed.
  2. 25-10-2024
    Last modifiedVulnerability information updated.

Description

An improper authentication vulnerability in FSSO Collector version 5.0.295 and below may allow an unauthenticated user to bypass a FSSO firewall policy and access the protected network via sending specifically crafted UDP login notification packets.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.03%

Chance of exploitation in the next 30 days

Percentile

63%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.03% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Fortinet2 products

1 vendor · 2 products

References

1 links