CVE-2026-15173: wireshark foundation wireshark Heap-based Buffer Overflow
CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-15173DEBIAN-CVE-2026-15173
Published 08-07-2026Last modified 09-07-2026
Vulnerability summary
CVE-2026-15173 is a medium (CVSS 5.5) Heap-based Buffer Overflow vulnerability in wireshark foundation wireshark. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.2% of scored vulnerabilities.
CVSS score
5.5/10
010
Medium · v3.1 (NVD)EPSS score
0.13%
0%100%
Low · +0.04 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 3 · Related 2Timeline
- 08-07-2026PublishedVulnerability first disclosed.
- 09-07-2026Last modifiedVulnerability information updated.
Description
pcapng file parser crash in Wireshark 4.6.0 to 4.6.6 allows denial of service
CVSS metrics
4 scores · 4 sources · 1 versionMedium 5.5Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSources4 sources · 4.7–5.5
- CVE.orgCNA4.7MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.13%
Chance of exploitation in the next 30 days
Percentile
2%
Versus all other CVEs
30-day change
+0.04 pp
From 0.09% on 20-09-2026
20-09-202620-10-2026
EPSS score0.13%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- wiresharkAll versions (No fix recorded) | < 4.6.9-1
Ubuntu1 product
- wiresharkAll versions (No fix recorded)
Wireshark1 product
- wireshark≥ 4.6.0, < 4.6.7
Wireshark foundation1 product
- wireshark≥ 4.6.0, < 4.6.7
4 vendors · 4 products
References
5 links- www.wireshark.org/security/wnpa-sec-2026-53.htmlVendor Advisory
