7.5

CVE-2021-1312: cisco cisco elastic services controller Uncontrolled Resource Consumption

CVSS: 7.5v3.1HighModified
Published 20-01-2021Last modified 12-11-2024
Open JSON

Vulnerability summary

CVE-2021-1312 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in cisco cisco elastic services controller. EPSS estimates a 2.56% chance of exploitation in the next 30 days, higher than 84.8% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
2.56%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 20-01-2021
    PublishedVulnerability first disclosed.
  2. 12-11-2024
    Last modifiedVulnerability information updated.

Description

A vulnerability in the system resource management of Cisco Elastic Services Controller (ESC) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) to the health monitor API on an affected device. The vulnerability is due to inadequate provisioning of kernel parameters for the maximum number of TCP connections and SYN backlog. An attacker could exploit this vulnerability by sending a flood of crafted TCP packets to an affected device. A successful exploit could allow the attacker to block TCP listening ports that are used by the health monitor API. This vulnerability only affects customers who use the health monitor API.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

2.56%

Chance of exploitation in the next 30 days

Percentile

85%

Versus all other CVEs

30-day change

+0.03 pp

From 2.52% on 19-09-2026

19-09-202619-10-2026
EPSS score
2.56%

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

Cisco2 products

1 vendor · 2 products

References

1 links