5.8

CVE-2021-1377: cisco cisco_ios Resource Management Errors

CVSS: 5.8v3.1MediumModified
Published 24-03-2021Last modified 08-11-2024
Open JSON

Vulnerability summary

CVE-2021-1377 is a medium (CVSS 5.8) Resource Management Errors vulnerability in cisco cisco_ios. EPSS estimates a 1.48% chance of exploitation in the next 30 days, higher than 73.5% of scored vulnerabilities.

Overall risk
23/100
0100
Low · default modelHow is this calculated?
CVSS score
5.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
1.48%
0%100%
Low · +0.05 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 24-03-2021
    PublishedVulnerability first disclosed.
  2. 08-11-2024
    Last modifiedVulnerability information updated.

Description

A vulnerability in Address Resolution Protocol (ARP) management of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to prevent an affected device from resolving ARP entries for legitimate hosts on the connected subnets. This vulnerability exists because ARP entries are mismanaged. An attacker could exploit this vulnerability by continuously sending traffic that results in incomplete ARP entries. A successful exploit could allow the attacker to cause ARP requests on the device to be unsuccessful for legitimate hosts, resulting in a denial of service (DoS) condition.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.48%

Chance of exploitation in the next 30 days

Percentile

74%

Versus all other CVEs

30-day change

+0.05 pp

From 1.43% on 18-09-2026

18-09-202618-10-2026
EPSS score
1.48%

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

Cisco3 products
  • cisco_iosn/a
  • ios12.2\(6\)i1 | 15.1\(3\)svr1 | 15.1\(3\)svr2 | 15.1\(3\)svr3 | 15.1\(3\)svs | 15.1\(3\)svs1 | 15.2\(2\)e6 | 15.2\(2\)e7 | 15.2\(2\)e7b | 15.2\(2\)e8 | 15.2\(2\)e9 | 15.2\(2\)e9a | 15.2\(2\)e10 | 15.2\(3\)e5 | 15.2\(4\)e4 | 15.2\(4\)e5 | 15.2\(4\)e5a | 15.2\(4\)e6 | 15.2\(4\)e7 | 15.2\(4\)e8 | 15.2\(4\)e9 | 15.2\(4\)e10 | 15.2\(4\)e10a | 15.2\(4\)ea6 | 15.2\(4\)ea7 | 15.2\(4\)ea8 | 15.2\(4\)ea9 | 15.2\(4\)ea9a | 15.2\(4\)ea10 | 15.2\(5\)e1 | 15.2\(5\)e2 | 15.2\(5\)e2b | 15.2\(5\)e2c | 15.2\(5\)ex | 15.2\(5a\)e1 | 15.2\(6\)e | 15.2\(6\)e0a | 15.2\(6\)e0c | 15.2\(6\)e1 | 15.2\(6\)e1a | 15.2\(6\)e1s | 15.2\(6\)e2 | 15.2\(6\)e2a | 15.2\(6\)e2b | 15.2\(6\)e3 | 15.2\(6\)eb | 15.2\(7\)e | 15.2\(7\)e0a | 15.2\(7\)e0b | 15.2\(7\)e0s | 15.2\(7\)e1 | 15.2\(7\)e1a | 15.2\(7\)e2 | 15.2\(7\)e2a | 15.2\(7\)e2b | 15.2\(7\)e3 | 15.2\(7a\)e0b | 15.2\(7b\)e0b | 15.3\(3\)jpc97 | 15.4\(1\)sy | 15.4\(1\)sy1 | 15.4\(1\)sy2 | 15.4\(1\)sy3 | 15.4\(1\)sy4 | 15.5\(1\)sy | 15.5\(1\)sy1 | 15.5\(1\)sy2 | 15.5\(1\)sy3 | 15.5\(1\)sy4 | 15.5\(1\)sy5 | 15.5\(1\)sy6 | 15.5\(3\)m4 | 15.5\(3\)m4a | 15.5\(3\)m4b | 15.5\(3\)m4c | 15.5\(3\)m5 | 15.5\(3\)m6 | 15.5\(3\)m6a | 15.5\(3\)m7 | 15.5\(3\)m8 | 15.5\(3\)m9 | 15.5\(3\)m10 | 15.5\(3\)m11 | 15.5\(3\)s4 | 15.5\(3\)s5 | 15.5\(3\)s6 | 15.5\(3\)s6a | 15.5\(3\)s6b | 15.5\(3\)s7 | 15.5\(3\)s8 | 15.5\(3\)s9 | 15.5\(3\)s9a | 15.5\(3\)s10 | 15.5\(3\)s10a | 15.6\(3\)m2 | 15.6\(3\)m2a | 15.6\(3\)m3 | 15.6\(3\)m3a | 15.6\(3\)m4 | 15.6\(3\)m5 | 15.6\(3\)m6 | 15.6\(3\)m6a | 15.6\(3\)m6b | 15.6\(3\)m7 | 15.6\(3\)m8 | 15.6\(3\)m9 | 15.7\(3\)m | 15.7\(3\)m0a | 15.7\(3\)m1 | 15.7\(3\)m2 | 15.7\(3\)m3 | 15.7\(3\)m4 | 15.7\(3\)m4a | 15.7\(3\)m4b | 15.7\(3\)m5 | 15.7\(3\)m6 | 15.7\(3\)m7 | 15.8\(3\)m | 15.8\(3\)m0a | 15.8\(3\)m0b | 15.8\(3\)m1 | 15.8\(3\)m1a | 15.8\(3\)m2 | 15.8\(3\)m2a | 15.8\(3\)m3 | 15.8\(3\)m3a | 15.8\(3\)m3b | 15.8\(3\)m4 | 15.8\(3\)m5 | 15.9\(3\)m | 15.9\(3\)m0a | 15.9\(3\)m1 | 15.9\(3\)m2 | 15.9\(3\)m2a
  • ios_xe3.6.6e | 3.6.7ae | 3.6.7be | 3.6.7e | 3.6.8e | 3.6.9ae | 3.6.9e | 3.6.10e | 3.7.5e | 3.8.4e | 3.8.5ae | 3.8.5e | 3.8.6e | 3.8.7e | 3.8.8e | 3.8.9e | 3.8.10e | 3.9.1e | 3.9.2be | 3.9.2e | 3.10.0ce | 3.10.0e | 3.10.1ae | 3.10.1e | 3.10.1se | 3.10.2e | 3.10.3e | 3.11.0e | 3.11.1ae | 3.11.1e | 3.11.2ae | 3.11.2e | 3.11.3ae | 3.11.3e | 3.16.4as | 3.16.4bs | 3.16.4cs | 3.16.4ds | 3.16.4es | 3.16.4gs | 3.16.4s | 3.16.5as | 3.16.5bs | 3.16.5s | 3.16.6bs | 3.16.6s | 3.16.7as | 3.16.7bs | 3.16.7s | 3.16.8s | 3.16.9s | 3.16.10as | 3.16.10s | 16.3.2 | 16.3.3 | 16.3.4 | 16.3.5 | 16.3.5b | 16.3.6 | 16.3.7 | 16.3.8 | 16.3.9 | 16.3.10 | 16.3.11 | 16.4.1 | 16.4.2 | 16.4.3 | 16.5.1 | 16.5.1a | 16.5.1b | 16.5.2 | 16.5.3 | 16.6.1 | 16.6.2 | 16.6.3 | 16.6.4 | 16.6.4a | 16.6.4s | 16.6.5 | 16.6.5a | 16.6.5b | 16.6.6 | 16.6.7 | 16.6.7a | 16.6.8 | 16.7.1 | 16.7.1a | 16.7.1b | 16.7.2 | 16.7.3 | 16.7.4 | 16.8.1 | 16.8.1a | 16.8.1b | 16.8.1c | 16.8.1d | 16.8.1e | 16.8.1s | 16.8.2 | 16.8.3 | 16.9.1 | 16.9.1a | 16.9.1b | 16.9.1c | 16.9.1d | 16.9.1s | 16.9.2 | 16.9.2a | 16.9.2s | 16.9.3 | 16.9.3a | 16.9.3h | 16.9.3s | 16.9.4 | 16.9.4c | 16.9.5 | 16.9.5f | 16.9.6 | 16.10.1 | 16.10.1a | 16.10.1b | 16.10.1c | 16.10.1d | 16.10.1e | 16.10.1f | 16.10.1g | 16.10.1s | 16.10.2 | 16.10.3 | 16.11.1 | 16.11.1a | 16.11.1b | 16.11.1c | 16.11.1s | 16.11.2 | 16.12.1 | 16.12.1a | 16.12.1c | 16.12.1s | 16.12.1t | 16.12.1w | 16.12.1x | 16.12.1y | 16.12.1z | 16.12.2 | 16.12.2a | 16.12.2s | 16.12.2t | 16.12.3 | 16.12.3a | 16.12.3s | 16.12.4 | 16.12.4a | 17.1.1 | 17.1.1a | 17.1.1s | 17.1.1t | 17.1.2 | 17.2.1 | 17.2.1a | 17.2.1r | 17.2.1v | 17.2.2 | 17.3.1 | 17.3.1a | 17.3.1w | 17.3.2 | 17.3.2a

1 vendor · 3 products

References

1 links