CVE-2016-1839

mediumpriority · track · 35EPSS 0.073 · 94 %ileexploit · functionalDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

7.35% (94th) EPSS

CVSS 4.3 · medium

Is it mine?

67 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-22

The xmlDictAddString function in libxml2 before 2.9.4, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1, allows remote attackers to cause a denial of service (heap-based buffer over-read) via a crafted XML document.

cvss

Technical severity, 0–10. One row per scoring source.

7.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.3–7.3

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v3.05.5mediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 3.6

v3.05.2mediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:Psecondary · CVSS-BT (t0sche)

v3.17.3highAV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · FSTEC (BDU) RU

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125USprimaryCWE-119US

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-39491libxml2 - xmlDictAddString Heap Buffer Overreadfunctional · exploit_db

affected products (67)

Products and version ranges known to be affected.

Dell NetWorker <19.11.0.2all versionscert_bundDE
Dell NetWorker <19.11.0.5all versionscert_bundDE
Dell NetWorker <19.13all versionscert_bundDE
Dell NetWorker Server <19.10.0.6all versionscert_bundDE
Dell NetWorker Server <19.11.0.2all versionscert_bundDE
F5 Advanced Firewall Managerall versionscert_bundDEcpe:/a:f5:big-ip_advanced_firewall_manager:-
F5 BIG-IPall versionscert_bundDEcpe:/a:f5:big-ip:-
F5 Policy Enforcement Managerall versionscert_bundDEcpe:/a:f5:big-ip_policy_enforcement_manager:10.2.4
F5 WebAccelerator 10.0.0 - 10.2.4all versionscert_bundDEcpe:/h:f5:big-ip_webaccelerator:10.2.4
Juniper Junos Space <20.1R1all versionscert_bundDE
Open Source libxml2all versionscert_bundDEcpe:/a:xmlsoft:libxml2:-
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE Linux Enterprise Desktop 12all versionscert_bundDEcpe:/o:suse:linux_enterprise_desktop:12
SUSE Linux Enterprise Desktop 12 SP1all versionscert_bundDEcpe:/o:suse:linux_enterprise_desktop:12:sp1
SUSE Linux Enterprise Server 12all versionscert_bundDEcpe:/o:suse:linux_enterprise_server:12
SUSE Linux Enterprise Server 12 SP1all versionscert_bundDEcpe:/o:suse:linux_enterprise_server:12:sp1
Dell Networker≤ Server <19.10.0.6cert_bundDE
Dell Networker≤ Server <19.11.0.2cert_bundDE

showing 20 of 67

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1614Tenable Security Nessus Network Monitor: Mehrere SchwachstellenDeutsch2023-06-29csaf · cert_bundDE
Ein entfernter, anonymer, authentisierter oder lokaler Angreifer kann mehrere Schwachstellen in Tenable Security Nessus Network Monitor ausnutzen, um beliebigen Code auszuführen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand auszulösen und Daten zu manipulieren.
WID-SEC-W-2024-3383libxml2: Mehrere Schwachstellen ermöglichen Ausführen von beliebigem Programmcode mit den Rechten des DienstesDeutsch2016-06-09csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in libxml2 ausnutzen, um beliebigen Programmcode mit den Rechten des Dienstes auszuführen oder um einen Denial of Service Zustand herbeizuführen.

also known as (8)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2016-05-20modified 2026-06-17

related (11,776)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-11645US	—OT critical	2.44% (84th)	KEV	2026-06-09
Out of bounds read and write in V8 in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium…
CVE-2026-3055US	critical9.8OT critical	4.04% (91st)	KEV	2026-03-23
Insufficient input validation in NetScaler ADC and NetScaler Gateway when configured as a SAML IDP leading to memory overread
CVE-2025-5777US	high7.5OT critical	100.0% (100th)	KEV	2025-06-17
Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
CVE-2025-5419US	—OT critical	7.82% (95th)	KEV	2025-06-03
Out of bounds read and write in V8 in Google Chrome prior to 137.0.7151.68 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium secur…
CVE-2025-24991US	—OT critical	2.02% (81st)	KEV	2025-03-11
Out-of-bounds read in Windows NTFS allows an authorized attacker to disclose information locally.

+11771 more

references (75)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan