CVE-2026-57527: Zed Attack Proxy (ZAP) ViewState add-on before version 4 contains an insecure deserialization vulnerability that allows attackers who control a proxied web server to achieve arbitr
Zed Attack Proxy (ZAP) ViewState add-on before version 4 contains an insecure deserialization vulnerability that allows attackers who control a proxied web server to achieve arbitrary code execution by embedding a malicious serialized Java object in the javax.faces.ViewState HTTP response parameter. The JSFViewState.decode() method base64-decodes the ViewState value and passes it directly to ObjectInputStream.readObject() without a deserialization filter, allowlist, or type restriction, causing the malicious object to be deserialized within the ZAP JVM when the Desktop UI renders the ViewState panel.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-57527
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-575270.46% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-57527 | coverage & exploitation status | NVD · CVE.org |
More from NVD Recent CVEs
- highCVE-2026-15491: A weakness has been identified in RafyMrX TOKO-ONLINE-ROTI up to ddfe1cd587be0a0b5135d8b6e85cc…2026-07-12
- highCVE-2026-15490: A security flaw has been discovered in RafyMrX TOKO-ONLINE-ROTI up to ddfe1cd587be0a0b5135d8b6…2026-07-12
- highCVE-2026-15489: A vulnerability was identified in RafyMrX TOKO-ONLINE-ROTI up to ddfe1cd587be0a0b5135d8b6e85cc…2026-07-12
- highCVE-2026-15488: A vulnerability was determined in hcr707305003 shiroiAdmin 1.1/1.3. Affected is the function F…2026-07-12
- mediumCVE-2026-15487: A vulnerability was found in TRENDnet TEW-821DAP 1.11B03. This impacts the function sub_41FBD0…2026-07-12