7.5

CVE-2021-21002: phoenix contact fl comserver

CVSS: 7.5v3.1HighModified
Published 25-06-2021Last modified 17-09-2024
Open JSON

Vulnerability summary

CVE-2021-21002 is a high (CVSS 7.5) vulnerability in phoenix contact fl comserver. EPSS estimates a 0.96% chance of exploitation in the next 30 days, higher than 60.9% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.96%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 25-06-2021
    PublishedVulnerability first disclosed.
  2. 17-09-2024
    Last modifiedVulnerability information updated.

Description

In Phoenix Contact FL COMSERVER UNI in versions < 2.40 a invalid Modbus exception response can lead to a temporary denial of service.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.96%

Chance of exploitation in the next 30 days

Percentile

61%

Versus all other CVEs

30-day change

0.00 pp

From 0.96% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.96%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Phoenixcontact2 products
Phoenix contact1 product
  • fl comserver≥ UNI 232/422/485 (2313452), < 2.40 | ≥ UNI 232/422/485-T (2904817), < 2.40

2 vendors · 3 products

References

1 links