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CVE-2021-41119

25
FAUCET Score

CVE-2021-41119 is a denial-of-service vulnerability affecting Wire-server releases prior to v2022-03-01. An unauthenticated attacker can exploit this by sending a crafted object that causes a hash collision, leading to quadratic time parsing and server unavailability. With a CVSS score of 7.5 (High), this network-based attack requires low complexity and no user interaction, impacting availability. There is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed on the CISA KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
< 2022-03-01CPE matchmatch criteria
cpe:2.3:a:wire:wire-server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.54%
Probability of exploitation in next 30 days
EPSS Percentile
72.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0154 is in the 54th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

cs-syd.eu / posts/2021-09-11-json-vulnerability
ExploitThird Party Advisory
github.com / wireapp/wire-server/security/advisories/GHSA-phxv-pffh-fq2r
Third Party Advisory