What is CVE-2021-34741?

CVE-2021-34741 is a high-severity vulnerability in Cisco Asyncos, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2021-11-04.

How severe is CVE-2021-34741?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Cisco Asyncos

CVE-2021-34741

A vulnerability in the email scanning algorithm of Cisco AsyncOS software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to perform a denial of service (DoS) attack against an affected device. This…

EPSS: 0.012 (66.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Cisco Asyncos — versions 13.5.3-010, 13.7.0-093
Cisco Email Security Appliance (Esa) — versions n/a
Cisco M170
Cisco M190
Cisco M380
Cisco M390
Cisco M390x
Cisco M680
Cisco M690
Cisco M690x

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2021-34741?: CVE-2021-34741 is a high-severity vulnerability in Cisco Asyncos, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2021-11-04.
How severe is CVE-2021-34741?: High severity. CVSS v3 base score is 7.5 out of 10.