PatchTheCVECVE-2019-13132: In ZeroMQ libzmq before 4.0.9, 4.1.x before 4.1.7, and 4.2.x before 4.3.2, a remote, unauthenticated client co
CVE-2019-13132 is a critical-severity flaw (CVSS 9.8) affecting libzmq, debian linux, ubuntu linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
In ZeroMQ libzmq before 4.0.9, 4.1.x before 4.1.7, and 4.2.x before 4.3.2, a remote, unauthenticated client connecting to a libzmq application, running with a socket listening with CURVE encryption/authentication enabled, may cause a stack overflow and overwrite the stack with arbitrary data, due to a buffer overflow in the library. Users running public servers with the above configuration are highly encouraged to upgrade as soon as possible, as
Why this priority
- Critical severity
- EPSS top 1%: very likely to be exploited
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 42.5% (top 1%) |
| CISA exploited list | No |
| Weakness | CWE-787 |
| Published | 2019-07-10 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2019-13132?
libzmq: upgrade to 4.0.9, 4.1.7, 4.3.2; debian linux: mitigate or apply the listed mitigation; ubuntu linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2019-13132 being exploited?
CVE-2019-13132 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2019-13132 affect?
CVE-2019-13132 affects libzmq, debian linux, ubuntu linux. Severity is critical (CVSS 9.8). In ZeroMQ libzmq before 4.0.9, 4.1.x before 4.1.7, and 4.2.x before 4.3.2, a remote, unauthenticated client connecting to a libzmq application, running with a socket listening with CURVE encryption/authentication enabled, may cause a stack
How urgent is CVE-2019-13132?
Priority 69/100. Critical severity; EPSS top 1%: very likely to be exploited; Remotely exploitable, no login, no user action; On your watchlist
Software pages
Ubuntu vulnerabilities · Debian vulnerabilities
Related CVEs
- CVE-2021-20237 HIGH 7.5 UPGRADE An uncontrolled resource consumption (memory leak) flaw was found in ZeroMQ's src/xpub.cpp in versions before
- CVE-2021-20235 HIGH 8.1 UPGRADE There's a flaw in the zeromq server in versions before 4.3.3 in src/decoder_allocators.hpp
- CVE-2021-20234 MEDIUM 6.5 UPGRADE An uncontrolled resource consumption (memory leak) flaw was found in the ZeroMQ client in versions before 4.3.
- CVE-2020-36400 CRITICAL 9.8 DOWNGRADE ZeroMQ libzmq 4.3.3 has a heap-based buffer overflow in zmq::tcp_read, a different vulnerability than CVE-2021
- CVE-2020-15166 HIGH 7.5 UPGRADE MITIGATE In ZeroMQ before version 4.3.3, there is a denial-of-service vulnerability