7.7

CVE-2023-20200: cisco cisco firepower extensible operating system (fxos) Infinite Loop

CVSS: 7.7v3.1HighModified
Published 23-08-2023Last modified 01-07-2025
Open JSON

Vulnerability summary

CVE-2023-20200 is a high (CVSS 7.7) Infinite Loop vulnerability in cisco cisco firepower extensible operating system (fxos). EPSS estimates a 0.68% chance of exploitation in the next 30 days, higher than 51.5% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.7/10
010
High · v3.1 (CVE.org)
EPSS score
0.68%
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. 23-08-2023
    PublishedVulnerability first disclosed.
  2. 01-07-2025
    Last modifiedVulnerability information updated.

Description

A vulnerability in the Simple Network Management Protocol (SNMP) service of Cisco FXOS Software for Firepower 4100 Series and Firepower 9300 Security Appliances and of Cisco UCS 6300 Series Fabric Interconnects could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to the improper handling of specific SNMP requests. An attacker could exploit this vulnerability by sending a crafted SNMP request to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: This vulnerability affects all supported SNMP versions. To exploit this vulnerability through SNMPv2c or earlier, an attacker must know the SNMP community string that is configured on an affected device. To exploit this vulnerability through SNMPv3, the attacker must have valid credentials for an SNMP user who is configured on the affected device.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.68%

Chance of exploitation in the next 30 days

Percentile

52%

Versus all other CVEs

30-day change

0.00 pp

From 0.68% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.68%

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

Cisco10 products
  • cisco firepower extensible operating system (fxos)2.2.1.63 | 2.2.1.66 | 2.2.1.70 | 2.2.2.17 | 2.2.2.19 | 2.2.2.24 | 2.2.2.26 | 2.2.2.28 | 2.2.2.54 | 2.2.2.60 | 2.3.1.93 | 2.3.1.91 | 2.3.1.88 | 2.3.1.75 | 2.3.1.73 | 2.3.1.66 | 2.3.1.58 | 2.3.1.56
  • cisco unified computing system (managed)3.1(1e) | 3.1(1g) | 3.1(1h) | 3.1(1k) | 3.1(1l) | 3.1(2b) | 3.1(2c) | 3.1(2e) | 3.1(2f) | 3.1(2g) | 3.1(2h) | 3.1(3a) | 3.1(3b) | 3.1(3c) | 3.1(3d) | 3.1(3e) | 3.1(3f) | 3.1(3h) | 3.1(3j) | 3.1(3k) | 3.1(2d) | 3.1(3l) | 3.2(1d) | 3.2(2b) | 3.2(2c) | 3.2(2d) | 3.2(2e) | 3.2(2f) | 3.2(3a) | 3.2(3b) | 3.2(3d) | 3.2(3e) | 3.2(3g) | 3.2(3h) | 3.2(3i) | 3.2(3j) | 3.2(3k) | 3.2(3l) | 3.2(3n) | 3.2(3o) | 3.2(3p) | 4.0(1a) | 4.0(1b) | 4.0(1c) | 4.0(1d) | 4.0(2a) | 4.0(2b) | 4.0(2d) | 4.0(2e) | 4.0(4b) | 4.0(4c) | 4.0(4d) | 4.0(4e) | 4.0(4f) | 4.0(4g) | 4.0(4h) | 4.0(4a) | 4.0(4i) | 4.0(4k) | 4.0(4l) | 4.0(4m) | 4.0(4n) | 4.0(4o) | 4.1(1a) | 4.1(1b) | 4.1(1c) | 4.1(2a) | 4.1(1d) | 4.1(1e) | 4.1(2b) | 4.1(3a) | 4.1(3b) | 4.1(2c) | 4.1(3d) | 4.1(3c) | 4.1(3e) | 4.1(3f) | 4.1(3h) | 4.1(3i) | 4.1(3j) | 4.1(3k) | 4.2(1d) | 4.2(1c) | 4.2(1f) | 4.2(1i) | 4.2(1k) | 4.2(1l) | 4.2(1m) | 4.2(2a) | 4.2(2c) | 4.2(1n) | 4.2(2d) | 4.2(3b) | 4.2(2e)
  • firepower_4112_firmwarena
  • firepower_4115_firmwarena
  • firepower_4125_firmwarena

1 vendor · 10 products

References

1 links