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CVE-2020-26422

21
FAUCET Score

CVE-2020-26422 describes a buffer overflow vulnerability in the QUIC dissector of Wireshark versions 3.4.0 to 3.4.1, impacting Wireshark and Oracle ZFS Storage Appliance Kit. This medium-severity vulnerability (CVSS 5.3) allows for a denial of service through packet injection or a crafted capture file, requiring no user interaction. While the potential impact is limited to availability, there is currently no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.4.0CPE matchmatch criteria
cpe:2.3:a:wireshark:wireshark:3.4.0:*:*:*:*:*:*:*
3.4.1CPE matchmatch criteria
cpe:2.3:a:wireshark:wireshark:3.4.1:*:*:*:*:*:*:*
8.8CPE matchmatch criteria
cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.7LOW

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.2
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.67%
Probability of exploitation in next 30 days
EPSS Percentile
90.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0467 is in the 87th percentile among its peer group of 23,723 CVEs.

Social Chatter

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

Patch Available

Vendor Patches (1)

oraclepatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2020-26422Moderate

wireshark: QUIC dissector crash (wnpa-sec-2020-20)

Dec 18, 2020

References

gitlab.com / gitlab-org/cves/-/blob/master/2020/CVE-2020-26422.json
Third Party Advisory
gitlab.com / wireshark/wireshark/-/issues/17073
Issue TrackingThird Party Advisory
security.gentoo.org / glsa/202101-12
Third Party Advisory
oracle.com / security-alerts/cpuApr2021.html
PatchThird Party Advisory
wireshark.org / security/wnpa-sec-2020-20.html
Vendor Advisory