CVE-2021-33516

gir1.2-gupnp-1.6: An issue was discovered in GUPnP before 1.0.7 and 1.1.x and 1.2.x before1.2.5

CVE-2021-33516 is fixed in 6 products on 1 platform, first by gir1.2-gupnp-1.2 1.2.3-0ubuntu0.20.04.2, released May 24, 2021. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
8.3
Medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0108
65th percentile

An issue was discovered in GUPnP before 1.0.7 and 1.1.x and 1.2.x before1.2.5. It allows DNS rebinding. A remote web server can exploit thisvulnerability to trick a victim's browser into triggering actions againstlocal UPnP services implemented using this library. Depending on theaffected service, this could be used for data exfiltration, data tempering,etc.

Where it's fixed

ProductFixed inFixReleased
Linux
gir1.2-gupnp-1.2 · Ubuntu 20.04 LTS (focal) 1.2.3-0ubuntu0.20.04.2 gir1.2-gupnp-1.2 1.2.3-0ubuntu0.20.04.2 May 24, 2021
gir1.2-gupnp-1.6 · Ubuntu 24.10 (oracular) 1.2.4-1ubuntu1 gir1.2-gupnp-1.6 1.2.4-1ubuntu1 Jan 16, 2026
gir1.2-gupnp-1.6 · Ubuntu 25.04 (plucky) 1.2.4-1ubuntu1 gir1.2-gupnp-1.6 1.2.4-1ubuntu1 Jan 16, 2026
gupnp · RHEL 8 0:1.0.6-2.el8_4 RHSA-2021:2363 Jun 9, 2021
gupnp · ol 8 0:1.0.6-2.el8_4 ELSA-2021-2363 Jun 10, 2021
gupnp-devel · RHEL 8 0:1.0.6-2.el8_4 RHSA-2021:2363 Jun 9, 2021
gupnp-devel · ol 8 0:1.0.6-2.el8_4 ELSA-2021-2363 Jun 10, 2021
libgupnp-1.2-0 · Ubuntu 20.04 LTS (focal) 1.2.3-0ubuntu0.20.04.2 libgupnp-1.2-0 1.2.3-0ubuntu0.20.04.2 May 24, 2021
libgupnp-1.6-0 · Ubuntu 24.10 (oracular) 1.2.4-1ubuntu1 libgupnp-1.6-0 1.2.4-1ubuntu1 Jan 16, 2026
libgupnp-1.6-0 · Ubuntu 25.04 (plucky) 1.2.4-1ubuntu1 libgupnp-1.6-0 1.2.4-1ubuntu1 Jan 16, 2026

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