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CVE-2021-1677

19
FAUCET Score

CVE-2021-1677 is an Azure Active Directory Pod Identity Spoofing Vulnerability affecting Microsoft Azure Kubernetes Service. With a CVSS score of 5.5 (MEDIUM), it allows a local, low-privileged attacker to achieve high confidentiality impact without user interaction. There is no evidence of active exploitation, nor is public exploit code available in common repositories like Metasploit or ExploitDB. Despite this, the vulnerability has garnered some community discussion and media coverage, indicating a degree of awareness.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:microsoft:azure_kubernetes_service:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.13%
Probability of exploitation in next 30 days
EPSS Percentile
63.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0113 is in the 97th percentile among its peer group of 15,940 CVEs.

Social Chatter

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

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

microsoftpatch availablevia msrc
Product: Microsoft Azure Kubernetes Service
View patch

Vendor Advisories (1)

microsoft2021-Jan/CVE-2021-1677Important

Azure Active Directory Pod Identity Spoofing Vulnerability

Jan 12, 2021

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2021-1677
msrc.microsoft.com / update-guide/vulnerability/CVE-2021-1677