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High 7.8Published May 9, 2020
CVE-2020-12762json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file, as demonstrated by printbuf_memappend.
Updated under an hour ago ()
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It affects Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP and 19 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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json-c through 0.14 has an integer overflow and out-of-bounds write via a large JSON file, as demonstrated by printbuf_memappend.
- CVSS
- 7.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- mitre
- NVD analysis
- Modified
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.0 before V3.1.5 | CISA ADP |
Siemens RUGGEDCOM ROX MX5000 siemens:ruggedcom_rox_mx5000 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX MX5000RE siemens:ruggedcom_rox_mx5000re (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX1400 siemens:ruggedcom_rox_rx1400 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX1500 siemens:ruggedcom_rox_rx1500 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX1501 siemens:ruggedcom_rox_rx1501 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX1510 siemens:ruggedcom_rox_rx1510 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX1511 siemens:ruggedcom_rox_rx1511 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX1512 siemens:ruggedcom_rox_rx1512 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX1524 siemens:ruggedcom_rox_rx1524 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX1536 siemens:ruggedcom_rox_rx1536 (from the name) | before V2.17.0 | CISA ADP |
Siemens RUGGEDCOM ROX RX5000 siemens:ruggedcom_rox_rx5000 (from the name) | before V2.17.0 | CISA ADP |
json-c json-c json-c:json-c | before 0.15-20200726 | NVD |
fedoraproject fedora fedoraproject:fedora | 30; 31; 32 | NVD |
debian debian_linux debian:debian_linux | 8.0; 9.0; 10.0 | NVD |
canonical ubuntu_linux canonical:ubuntu_linux | 12.04; 14.04; 16.04; 18.04; 19.10; 20.04 | NVD |
siemens sinec_ins siemens:sinec_ins | all versions; 1.0; 1.0 | NVD |
References
- https://github.com/json-c/json-c/pull/592exploit, patch, third-party-advisory
- https://github.com/rsyslog/libfastjson/issues/161exploit, third-party-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CQQRRGBQCAWNCCJ2HN3W5SSCZ4QGMXQI/vendor-advisory
- https://usn.ubuntu.com/4360-1/vendor-advisory, third-party-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CBR36IXYBHITAZFB5PFBJTED22WO5ONB/vendor-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W226TSCJBEOXDUFVKNWNH7ETG7AR6MCS/vendor-advisory
- https://lists.debian.org/debian-lts-announce/2020/05/msg00032.htmlmailing-list, third-party-advisory
- https://lists.debian.org/debian-lts-announce/2020/05/msg00034.htmlmailing-list, third-party-advisory
- https://usn.ubuntu.com/4360-4/vendor-advisory, third-party-advisory
- https://security.gentoo.org/glsa/202006-13vendor-advisory, third-party-advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00031.htmlmailing-list, third-party-advisory
- https://www.debian.org/security/2020/dsa-4741vendor-advisory, third-party-advisory
- https://security.netapp.com/advisory/ntap-20210521-0001/third-party-advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdfthird-party-advisory
- https://lists.debian.org/debian-lts-announce/2023/06/msg00023.htmlmailing-list, third-party-advisory
- https://lists.debian.org/debian-lts-announce/2025/07/msg00021.html
- https://cert-portal.siemens.com/productcert/html/ssa-202008.html
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-637483.html
- https://cert-portal.siemens.com/productcert/html/ssa-794697.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.