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Wireshark disclosed CVE-2026-15164, a vulnerability in the ciscodump external capture interface that can cause the tool to crash when a user connects to a hostile device. The issue was documented in Wireshark advisory wnpa-sec-2026-63 and tracked in the project's GitLab issue tracker, with discovery credited to 0sec and Doruk Tan Ozturk.
The flaw affects Wireshark versions 4.6.0 through 4.6.6 and 4.4.0 through 4.4.16. Wireshark said the problem has been fixed in versions 4.6.7 and 4.4.17, and organizations using ciscodump should upgrade to those releases to prevent crashes that could be triggered through interaction with untrusted network devices.
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On July 8, 2026, Wireshark published security advisory WNPA-SEC-2026-63 for a crash vulnerability in the ciscodump external capture interface, tracked as CVE-2026-15164. The advisory says affected versions include 4.6.0 through 4.6.6 and 4.4.0 through 4.4.16, and that exploitation would require convincing a user to connect to a hostile device.
Wireshark stated that the ciscodump extcap crash vulnerability was fixed in versions 4.6.7 and 4.4.17. The project recommended users upgrade to those releases or later.
Wireshark tracked a crash vulnerability in the ciscodump external capture interface under issue 21375. The issue is the bug tracker reference later cited by the security advisory for CVE-2026-15164.
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Wireshark disclosed and patched multiple vulnerabilities in its Catapult DCT2000 handling code, including a protocol dissector crash tracked as **CVE-2026-15174** and a separate file parser flaw later assigned **CVE-2026-76883**. The first issue, published as advisory **`wnpa-sec-2026-52`**, affects Wireshark versions **4.6.0 through 4.6.6** and **4.4.0 through 4.4.16** and can be triggered by a malformed packet on the wire or by opening a malformed packet trace file, causing the application to crash. A later advisory, **`wnpa-sec-2026-74`**, covers a Catapult DCT2000 file parser crash affecting versions **4.6.0 through 4.6.7** and **4.4.0 through 4.4.17**, fixed in **4.6.8** and **4.4.18**. Separately, a GitLab issue detailed an off-by-one heap out-of-bounds write in `parse_line()` within `wiretap/catapult_dct2000.c`, where the parser allocates `floor(data_chars/2)` bytes but may write `ceil(data_chars/2)` bytes when the input length is odd; developers confirmed the bug, noted practical triggering requires exactly **2049 bytes**, and merged fixes. Wireshark said no exploits are known for the disclosed issues and advised users to upgrade to patched releases.
Aug 21, 2026
Wireshark disclosed **CVE-2026-5653**, a heap-based buffer overflow in its DCP-ETSI protocol dissector that can crash the network protocol analyzer and cause a denial of service. The flaw affects Wireshark versions `4.6.0` through `4.6.4` and `4.4.0` through `4.4.14`, and was assigned **CWE-122** with a **CVSS v3.1 score of 5.5**. According to the advisory, an attacker could trigger the issue by injecting a malformed packet onto the network or by convincing a user to open a crafted packet capture file. Wireshark fixed the vulnerability in versions `4.6.5` and `4.4.15`; the issue was discovered by Alexandre de Oliveira, and the vendor said no active exploits were known at the time of disclosure.
Aug 21, 2026
Wireshark disclosed and patched a high-severity vulnerability in its C12.22 protocol dissector that can crash the application when processing malformed traffic or packet captures. The flaw, tracked as **CVE-2026-76886** and covered by advisory **`wnpa-sec-2026-75`**, stems from the EAX/CMAC decryption path, where `Eax_Decrypt()` accepts 32-bit lengths but passes them into 16-bit CMAC helper logic, causing integer truncation, undersized heap allocation, and subsequent oversized `memcpy()` operations that lead to a heap-buffer overflow. The vulnerable code path is reachable through reassembled C12.22 traffic over **TCP/1153** when **`c1222.decrypt`** is enabled and a matching decryption-table entry exists; researchers reported that a crafted **65,576-byte** MESSAGE can reliably trigger the crash. Wireshark said affected versions are **4.6.0 through 4.6.7** and **4.4.0 through 4.4.17**, with fixes released in **4.6.8** and **4.4.18** that reject oversized CMAC inputs before allocation. The issue was reported by researchers from **Aisle Research, O2Lab, and TAMU**, and Wireshark said no active exploits are known.
Aug 21, 2026