Cisco Umbrella Link and CSV Formula Injection Vulnerabilities

published 2021-04-08 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-6942

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits: 0; none known

Multiple vulnerabilities in the Admin audit log export feature and Scheduled Reports feature of Cisco Umbrella could allow an authenticated, remote attacker to perform formula and link injection attacks on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

Patch / fix

links 1

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-umb… advisory

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-11-08)

Exploit prediction

0.76% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
NVD	3.1	4.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N
NVD	2.0	3.5	AV:N/AC:M/Au:S/C:N/I:P/A:N

Affected products

Cisco Cisco Umbrella Insights Virtual Appliance

Classification

Weakness

CWE-1236 Improper Neutralization of Formula Elements in a CSV File

References

tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-umbrella-inject-gbZGHP5T
vendor-advisory, patch

Sources

CVE List CVE-2021-1475
NVD CVE-2021-1475

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary