How severe is CVE-2017-7747?

CVE-2017-7747 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2017-7747 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-7747?

CVE-2017-7747 primarily affects Wireshark. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-7747?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-7747 published?

CVE-2017-7747 was published on 2017-04-12 and last updated on 2026-06-17.

CVE-2017-7747

CVE-2017-7747 is a high-severity vulnerability in Wireshark with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Wireshark
Published: 2017-04-12
Last modified: 2026-06-17

Description

In Wireshark 2.2.0 to 2.2.5 and 2.0.0 to 2.0.11, the PacketBB dissector could crash, triggered by packet injection or a malformed capture file. This was addressed in epan/dissectors/packet-packetbb.c by restricting additions to the protocol tree.

Frequently asked questions

What is CVE-2017-7747?: In Wireshark 2.2.0 to 2.2.5 and 2.0.0 to 2.0.11, the PacketBB dissector could crash, triggered by packet injection or a malformed capture file. This was addressed in epan/dissectors/packet-packetbb.c by restricting additions to the protocol tree.
How severe is CVE-2017-7747?: CVE-2017-7747 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2017-7747 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-7747?: CVE-2017-7747 primarily affects Wireshark. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-7747?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-7747 published?: CVE-2017-7747 was published on 2017-04-12 and last updated on 2026-06-17.

References

Affected products (19)

cpe:2.3:a:wireshark:wireshark:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.0.1:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.0.2:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.0.3:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.0.4:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.0.5:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.0.6:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.0.7:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.0.8:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.0.9:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.0.10:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.0.11:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.2.0:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.2.1:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.2.2:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.2.3:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.2.4:*:*:*:*:*:*:*
cpe:2.3:a:wireshark:wireshark:2.2.5:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

More vulnerabilities in Wireshark

CVE-2011-0444 — Critical (CVSS 10.0): Buffer overflow in the MAC-LTE dissector (epan/dissectors/packet-mac-lte.c) in Wireshark 1.2.0 through 1.2.13 and 1.4.0…
CVE-2010-2995 — Critical (CVSS 10.0): The SigComp Universal Decompressor Virtual Machine (UDVM) in Wireshark 0.10.8 through 1.0.14 and 1.2.0 through 1.2.9…
CVE-2010-2994 — Critical (CVSS 10.0): Stack-based buffer overflow in the ASN.1 BER dissector in Wireshark 0.10.13 through 1.0.14 and 1.2.0 through 1.2.9 has…
CVE-2009-1266 — Critical (CVSS 10.0): Unspecified vulnerability in Wireshark before 1.0.7 has unknown impact and attack vectors.
CVE-2009-1210 — Critical (CVSS 10.0): Format string vulnerability in the PROFINET/DCP (PN-DCP) dissector in Wireshark 1.0.6 and earlier allows remote…
CVE-2008-3146 — Critical (CVSS 10.0): Multiple buffer overflows in packet_ncp2222.inc in Wireshark (formerly Ethereal) 0.9.7 through 1.0.2 allow attackers to…

All CVEs affecting Wireshark →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48277 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48055 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download any video media. In versions 2.4.0 and…
CVE-2026-34910 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit an Improper Input Validation vulnerability found in UniFi OS…
CVE-2026-33587 — Critical (CVSS 10.0): Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →