CVE-2026-76887: wireshark foundation wireshark Heap-based Buffer Overflow
CVSS: 6.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-76887DEBIAN-CVE-2026-76887
Published 19-08-2026Last modified 17-09-2026
Vulnerability summary
CVE-2026-76887 is a medium (CVSS 6.5) Heap-based Buffer Overflow vulnerability in wireshark foundation wireshark. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 6.6% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
0.18%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 4 · Related 4Timeline
- 19-08-2026PublishedVulnerability first disclosed.
- 17-09-2026Last modifiedVulnerability information updated.
Description
Crash in the Wireshark dissection engine in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
CVSS metrics
4 scores · 4 sources · 1 versionMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSources4 sources · 3.1–6.5
- CVE.orgCNA3.1LowCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:LDiffers
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.18%
Chance of exploitation in the next 30 days
Percentile
7%
Versus all other CVEs
30-day change
0.00 pp
From 0.18% on 19-09-2026
19-09-202619-10-2026
EPSS score0.18%
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) | < 4.4.18-0+deb13u1 | < 4.6.9-1
Ubuntu1 product
- wiresharkAll versions (No fix recorded)
Wireshark1 product
- wireshark≥ 4.4.0, < 4.4.18 | ≥ 4.6.0, < 4.6.8
Wireshark foundation1 product
- wireshark≥ 4.6.0, < 4.6.8 | ≥ 4.4.0, < 4.4.18
4 vendors · 4 products
