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CVE-2021-46853

22
FAUCET Score

CVE-2021-46853 describes a denial-of-service vulnerability affecting Alpine versions prior to 2.25, where a remote attacker can crash the application by sending LIST or LSUB commands before STARTTLS. This vulnerability carries a CVSS score of 5.9 (Medium) due to its network-based attack vector and high attack complexity, leading to a potential high impact on availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.25CPE matchmatch criteria
cpe:2.3:a:alpine_project:alpine:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.84%
Probability of exploitation in next 30 days
EPSS Percentile
54.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0084 is in the 11th percentile among its peer group of 19,956 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 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

Remediation records are not available for this CVE.

References

bugs.gentoo.org / 807613
Issue TrackingThird Party Advisory
nostarttls.secvuln.info
Technical DescriptionThird Party Advisory
security.gentoo.org / glsa/202301-07
Third Party Advisory