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CVE-2021-29508

27
FAUCET Score

CVE-2021-29508 describes a critical deserialization vulnerability in asynkron wire, where malicious payloads can manipulate type information during serialization, allowing an attacker to instantiate arbitrary types on the deserializing end. This vulnerability has a CVSS score of 9.1 (Critical) due to its network attack vector, low attack complexity, and high impact on integrity and availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:asynkron:wire:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.58%
Probability of exploitation in next 30 days
EPSS Percentile
73.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0158 is in the 60th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

nugetGHSA-hpw7-3vq3-mmv6critical

Insecure deserialization in Wire

May 19, 2021

References

github.com / AsynkronIT/Wire/security/advisories/GHSA-hpw7-3vq3-mmv6
ExploitThird Party Advisory
nuget.org / packages/Wire
Third Party Advisory