What is CVE-2021-27877?

CVE-2021-27877 is a high-severity vulnerability in N/a. CVSS score: 8.2/10. Published 2021-03-01.

How severe is CVE-2021-27877?

High severity. CVSS v3 base score is 8.2 out of 10.

Is CVE-2021-27877 known to be exploited?

Yes. CVE-2021-27877 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-04-07), indicating it is being actively exploited. 5 public proof-of-concept repositories are indexed.

Vulnerability in N/a

CVE-2021-27877

An issue was discovered in Veritas Backup Exec before 21.2. It supports multiple authentication schemes: SHA authentication is one of these. This authentication scheme is no longer used in current versions of the product, but hadn't yet be…

EPSS: 0.455 (97.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AC:L/AV:N/A:N/C:H/I:L/PR:N/S:U/UI:N.

Affected products

N/a — versions n/a

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2023-04-07. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2023-04-28.

Required action: Apply updates per vendor instructions.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

www.veritas.com/content/support/en_US/security/VTS21-001 (x_refsource_MISC)
packetstormsecurity.com/files/168506/Veritas-Backup-Exec-Agent-Remote-Code-Exec… (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-27877?: CVE-2021-27877 is a high-severity vulnerability in N/a. CVSS score: 8.2/10. Published 2021-03-01.
How severe is CVE-2021-27877?: High severity. CVSS v3 base score is 8.2 out of 10.
Is CVE-2021-27877 known to be exploited?: Yes. CVE-2021-27877 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-04-07), indicating it is being actively exploited. 5 public proof-of-concept repositories are indexed.