CVE-2021-34749

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.68% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 76.5% of scored records. A rank, not a probability.

NVD base score

8.6 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-08-18 19:40Z5 YR AGO

Last updated

2024-11-07 22:03Z1 YR AGO

Reserved

2021-06-15

Assigning CNA

cisco

Record state

PUBLISHED

Severity

Medium (CVSS 5.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Weaknesses

• CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass

Data version

5.1

Document digest

c7d1be7244d87bddba13bd01cf16faab9670f78dadb38025d1055e8296123290

• tools.cisco.com20210818 Multiple Cisco Products Server Name Identification Data Exfiltration Vulnerabilityhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sni-data-exfil-mFgzXqLNvendor-advisory
• lists.debian.org[debian-lts-announce] 20230210 [SECURITY] [DLA 3317-1] snort security updatehttps://lists.debian.org/debian-lts-announce/2023/02/msg00011.htmlmailing-list
• www.debian.orgDSA-5354https://www.debian.org/security/2023/dsa-5354vendor-advisory