5.3

CVE-2021-21003: phoenix contact fl nat Improper Resource Shutdown or Release

CVSS: 5.3v3.1MediumModified
Published 25-06-2021Last modified 17-09-2024
Open JSON

Vulnerability summary

CVE-2021-21003 is a medium (CVSS 5.3) Improper Resource Shutdown or Release vulnerability in phoenix contact fl nat. EPSS estimates a 0.95% chance of exploitation in the next 30 days, higher than 60.4% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.95%
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 SWITCH SMCS series products in multiple versions fragmented TCP-Packets may cause a Denial of Service of Web-, SNMP- and ICMP-Echo services. The switching functionality of the device is not affected.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.95%

Chance of exploitation in the next 30 days

Percentile

60%

Versus all other CVEs

30-day change

0.00 pp

From 0.95% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.95%

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

Phoenixcontact15 products
Phoenix contact2 products
  • fl nat≥ SMN 8TX (2989365), ≤ 4.63 | ≥ SMN 8TX-M (2702443), ≤ 4.63
  • fl switch≥ SMCS 16TX (2700996), ≤ 4.70 | ≥ SMCS 14TX/2FX (2700997), ≤ 4.70 | ≥ SMCS 14TX/2FX-SM (2701466), ≤ 4.70 | ≥ SMCS 8GT (2891123), ≤ 4.70 | ≥ SMCS 6GT/2SFP (2891479), ≤ 4.70 | ≥ SMCS 8TX-PN (2989103), ≤ 4.70 | ≥ SMCS 4TX-PN (2989093), ≤ 4.70 | ≥ SMCS 8TX (2989226), ≤ 4.70 | ≥ SMCS 6TX/2SFP (2989323), ≤ 4.70 | ≥ SMN 6TX/2POF-PN (2700290), ≤ 4.70 | ≥ SMN 8TX-PN (2989501), ≤ 4.70 | ≥ SMN 6TX/2FX (2989543), ≤ 4.70 | ≥ SMN 6TX/2FX SM (2989556), ≤ 4.70

2 vendors · 17 products

References

1 links