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CVE-2021-1511

22
FAUCET Score

CVE-2021-1511 describes multiple vulnerabilities in Cisco SD-WAN vEdge Software that could allow an authenticated attacker to execute arbitrary code with root privileges or trigger a denial of service. With a CVSS score of 6.5 (Medium), this vulnerability requires low privileges and network access, but does not involve user interaction. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 20.4, < 20.4.1CPE matchmatch criteria
cpe:2.3:o:cisco:vedge_100_firmware:*:*:*:*:*:*:*:*
>= 20.5, < 20.5.1CPE matchmatch criteria
cpe:2.3:o:cisco:vedge_100_firmware:*:*:*:*:*:*:*:*
19.2.99CPE matchmatch criteria
cpe:2.3:o:cisco:vedge_100_firmware:19.2.99:*:*:*:*:*:*:*
>= 20.4, < 20.4.1CPE matchmatch criteria
cpe:2.3:o:cisco:vedge_1000_firmware:*:*:*:*:*:*:*:*
>= 20.5, < 20.5.1CPE matchmatch criteria
cpe:2.3:o:cisco:vedge_1000_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.6
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.02%
Probability of exploitation in next 30 days
EPSS Percentile
60.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0102 is in the 73rd percentile among its peer group of 21,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-buffover-MWGucjtO
Vendor Advisory